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  • 42.55
  • Springer  (132)
  • 1995-1999  (25)
  • 1980-1984  (107)
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Verlag/Herausgeber
  • Springer  (132)
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  • 1
    Digitale Medien
    Digitale Medien
    Group theory and experiments on helical and linear distributed feedback gas lasers (1984)
    Springer
    Applied physics 33 (1984), S. 115-131 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 02.20 ; 42.55 ; 42.60D
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract This study puts forward the concept of helical distributed feedback (DFB) lasers. The basic features of this new type of laser are derived by group theoretical considerations on cylindrical, circular linear periodic, and helical waveguide and laser structures. It is demonstrated that not only linear periodic structures but also helical structures show Bragg and DFB effects. Microwave and far-infrared experiments on passive helical metal waveguides reveal Bragg resonances in transmission. These results initiated the first experimental realization of a helical DFB gas laser, i.e. an optically pumped 496μm CH3F laser with a helical metal waveguide of a pitch close to 250μm. This helical DFB laser shows higher-mode selectivity than the corresponding linear DFB laser. Finally, we show that the concept of helical DFB also applies to dye lasers with internal DFB incorporated by a mixture of the dye with a cholesteric liquid crystal.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688518
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  • 2
    Digitale Medien
    Digitale Medien
    Submillimetre laser lines from CH3OH pumped by a13C18O2 pump laser: Observations and assignments (1984)
    Springer
    Applied physics 34 (1984), S. 17-21 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Twenty-four new optically pumped submillimetre laser lines have been observed when CH3OH is excited using a13C18O2 pump laser. Four of these lines have been assigned to transitions involving the CO stretching band. In addition to these lines, a further six new lines have been observed when pumping with12C18O2 and13C16O2 lasers. One of these lines has been assigned to a transition involving the CO stretching band. The observation of infrared-infrared double resonance signals in CH3OH has allowed the prediction of a further six laser lines which should be excited using a13C18O2 pump laser.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697459
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  • 3
    Digitale Medien
    Digitale Medien
    Coherent effects in inverse compton scattering in the high frequency region (1984)
    Springer
    Applied physics 34 (1984), S. 221-228 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 41
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The conditions under which a cooperative emission from different friges occurs in the scattering between a relativistic electron beam and two interfering laser beams are discussed. In particular, the conditions to have an electron grating are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697638
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  • 4
    Digitale Medien
    Digitale Medien
    Bistability and passive Q-switching of a CO2 laser with saturable absorber (1984)
    Springer
    Applied physics 35 (1984), S. 77-82 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The coexistence of bistability and repetitive passive Q-switching of a CO2 laser with a gaseous saturable absorber has been investigated experimentally. With CH3F as the saturable absorber bistability has been observed simultaneously with passive Q-switching, whereas with CH3OH either one of these phenomena can only exist, as demonstrated for the first time. The measured features of both systems can be explained qualitatively by rate-equation theory.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697426
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  • 5
    Digitale Medien
    Digitale Medien
    Optically pumped submillimetre laser action in formaldoxime and ammonia (1984)
    Springer
    Applied physics 35 (1984), S. 127-129 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Strong submillimetre laser action has been obtained on five lines of a new laser gas, formaldoxime. Several new emission lines have also been produced by isotopic CO2 laser pumping of14NH3 and15NH3. One of these lines at 102.9 μm is a rotation-inversion transition in the 2v 2 state, and is the first example of cw laser action in such a highly excited state.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697700
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  • 6
    Digitale Medien
    Digitale Medien
    Stepwise photoionization of complex organic molecules in the gas phase induced by UV laser radiation (1982)
    Springer
    Applied physics 27 (1982), S. 57-61 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 33 ; 82.50 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We measured the photoionization cross-sections of anthracene, 1,2-benzanthracene,p-terphenyl, and 2,5-diphenylfuran molecules excited to the singlet and triplet electronic states intermediate in the stepwise two-photon ionization process at 266 nm (all compounds) and at 355, 391 and 417 nm (anthracene).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697297
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  • 7
    Digitale Medien
    Digitale Medien
    Origin of laser-output noise of cataphoretic HeSe+ lasers (1982)
    Springer
    Applied physics 28 (1982), S. 373-381 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.80 ; 52
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We investigated noise and fluctuations of the output power of cataphoretic HeSe+ lasers in positive column plasma. Direct coupling of laser output power noise and fluctuations of the local population inversion was found. An investigation of the positive column plasma showed moving striations being responsible for the gain fluctuations. Whereas the local plasma properties are dominated by high frequency striations in the 100 kHz range, integrated quantities such as laser gain per pass are most strongly influenced by low-frequency waves with a continuous noise spectrum below 200 kHz. External modulation of the discharge voltage or current at a frequency near thehf striations reduces laser noise and increases laser output power.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00686369
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  • 8
    Digitale Medien
    Digitale Medien
    Lifetime, photostability, and chemical structure of IR heptamethine cyanine dyes absorbing beyond 1 μm (1982)
    Springer
    Applied physics 29 (1982), S. 15-18 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 32 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Optical absorption,S 1 lifetime, and photostability are investigated for a series of heptamethine ir dyes and related to chemical structure. The high photostability of several dyes and the large range ofS 1 lifetimes make these dyes very interesting for ir dye lasers and for ir mode-locked laser systems.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00694363
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  • 9
    Digitale Medien
    Digitale Medien
    Strong far-infrared laser action in carbonyl fluoride and vinyl fluoride (1982)
    Springer
    Applied physics 29 (1982), S. 13-14 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Intense far-infrared laser action is reported for carbonyl fluoride and vinyl fluoride. Eleven new lines with wavelengths between 339 μm≦λ≦538 μm were obtained by optically pumping carbonyl fluoride with numerous lines of the 10.4 μm band of a cw CO2 laser. Twenty-three lines with wavelengths in the range 172 μm≦λ≦783 μm were detected when pumping the recently discovered efficient FIR laser molecule vinyl fluoride. In addition, three very weak new lines were found using 1.1-difluoroethylen.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00694362
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  • 10
    Digitale Medien
    Digitale Medien
    Temporal analysis of a mode-locked Nd-glass laser by four-wave mixing (1982)
    Springer
    Applied physics 29 (1982), S. 263-267 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.65 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The duration, shape, and background intensity level of pulses of a passively modelocked Nd-glass laser are determined by noncollinear phase-matched four-photon frequency mixing of time-separated fundamental and second-harmonic pulses in a KI crystal. The pulse shape is found to be slightly asymmetric with slower trailing than rising parts. The background intensity level before and behind the main pulse is about 5¢10−6 the peak pulse intensity.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00689185
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  • 11
    Digitale Medien
    Digitale Medien
    New FIR laser lines from optically pumped DCOF (1983)
    Springer
    Applied physics 30 (1983), S. 1-4 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 33 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Twenty FIR laser lines with wavelengths between 146 and 2000 μm have been observed from deuterated formyl fluoride (DCOF) optically pumped with isotopic CO2 lasers. Tunable diode laser measurements on thev 4 band of DCOF were combined with earlier high precision spectroscopic data on thev 3 andv 4 bands, and enabled identification of the transitions responsible for 9 of the new FIR lines.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00692650
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  • 12
    Digitale Medien
    Digitale Medien
    Theory of synchronously pumped dye lasers (1983)
    Springer
    Applied physics 30 (1983), S. 135-142 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract An analysis of cw synchronously pumped dye lasers is presented. Under the assumption that the cavity (tuning element) bandwidth is much wider than the bandwidth of the transform limited pulses generated, the pulse forming dynamics is rigorously treated. It is shown that for a finite mismatch between the lengths of the dye and the pump lasers, a steady-state pulse develops in the dye laser cavity with a conserved pulseshape. The characteristics (energy, shape, peak power, duration) of these pulses of ultimate width are quantitatively determined as a function of cavity mismatch. An analytical solution for the pulse envelope is determined, which yieldsI(t)∝Sech2(t/t p ) to a good approximation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00695468
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  • 13
    Digitale Medien
    Digitale Medien
    The effect of added nitrogen on multiphoton absorption by ammonia (1983)
    Springer
    Applied physics 32 (1983), S. 75-78 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 33 ; 34 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Multiphoton absorption (MPA) of the CO2 laser 9 μmR(30) line (pulse width 60 ns, FWHM) by NH3 and NH3/N2 mixtures was studied as a function of gas composition, pressure and laser fluence (Φ). MPA occurs for Φ smaller than those that have been used for optically pumped NH3/N2 lasers; consequently a simple two-level absorption model will not adequately describe laser action in these systems. The photon energy deposited in NH3/N2 mixtures can be calculated from the MPA cross-section and the fluence dependence of the illumination geometry. An examination of the efficiency of conversion of this absorbed energy to the reported radiant energy of optically pumped NH3/N2 lasers shows an optimum value which depends on pressure, and gas composition.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688546
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  • 14
    Digitale Medien
    Digitale Medien
    Power enhancement of the cw 12.08 μm NH3 Raman laser with the addition of H2/He buffer gases (1983)
    Springer
    Applied physics 32 (1983), S. 105-111 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The effects of H2, He, and N2 buffer gases on the efficiency of the cw 12.08 μm NH3 Raman laser are studied experimentally. The laser output power is increased by nearly 60% with the addition of H2 or He, which we essentially attribute to the high thermal conductivity of these buffer gases. In the optimum conditions (NH3/H2:1/1 mixture with 0.35 Torr partial pressure of NH3) 3.3 W output power at 12.08 μm is obtained which corresponds to 11% power conversion efficiency.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688814
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  • 15
    Digitale Medien
    Digitale Medien
    A cw uv copper hollow cathode laser in the 260 nm region (1983)
    Springer
    Applied physics 32 (1983), S. 127-135 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A cw uv copper hollow cathode laser is described, which could be operated for a longer time duration with an output power of 7 mW in the 260 nm region. A double-cathode configuration with a protection for the mirrors from metal-vapour deposition is presented. Characteristics of the laser output power, the spontaneous emission, and the ion densities in the negative glow were measured as depending on the discharge current, the neon gas pressure, and the size of the cathode slit. The observed saturation of the laser output power at high discharge current (1 A/cm2) and the optimum slot size are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688818
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  • 16
    Digitale Medien
    Digitale Medien
    CW and pulsed FIR-CO2 hybrid laser with improved efficiency and amplitude stability at short FIR wavelengths (1984)
    Springer
    Applied physics 33 (1984), S. 23-27 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract For the first time stable cw output of a FIR-CO2 hybrid laser has been achieved at wavelengths shorter than 300 μm. Due to the saturable absorber characteristic of the FIR laser gas, cw or pulsed emission is observed on both, the CO2 and the FIR laser output, depending on the operating conditions. Results are reported on different resonant lines in CH3OH and the 67 μm Raman line in NH3. The good efficiency of this laser is also demonstrated by the excitation of two new emission lines in CH3OH, namely 49 and 56 μm, pumped by 9R(22) and 9R(24), respectively.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00690022
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  • 17
    Digitale Medien
    Digitale Medien
    The effect of triplet quenchers on vapor-phase dye-laser performance (1984)
    Springer
    Applied physics 34 (1984), S. 83-86 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 33.50 ; 34.50 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract An XeF pumped vapor phase POPOP dye laser with a pulse duration of 300 ns was obtained when trans-stilbene was used as triplet quencher. An energy conversion efficiency of 7,5% with a peak power efficiency of 12% was measured.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697952
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  • 18
    Digitale Medien
    Digitale Medien
    New cw fir laser emissions from CO2 laser-pumped vinyl bromide (1984)
    Springer
    Applied physics 34 (1984), S. 175-177 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract 47 new cw far-infrared laser lines with wavelenths between 453 and 2356 μm have been obtained by optically pumping vinyl bromide (C2H3Br) by a CO2 laser. A significant portion of these lines has wavelengths longer than 750 μm.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697631
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  • 19
    Digitale Medien
    Digitale Medien
    Small-signal gain of Free Electron Laser in a resonator Gaussian mode (1984)
    Springer
    Applied physics 35 (1984), S. 163-166 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.50 ; 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We present an analytical expression for the small-signal gain of a Free Electron Laser (FEL) in the presence of a Gaussian mode. To describe the electron beam evolution we use the one-dimensional (1-d) Vlasov equation. Our perturbation result, valid for small values of the parameterq (length of the undulatorL divided by the Rayleigh rangeZ R), can be extrapolated to values ofq≈4÷5.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697707
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  • 20
    Digitale Medien
    Digitale Medien
    Spectral investigation of cw rf-pumped atomic Xe laser with a slab geometry (1996)
    Springer
    Applied physics 62 (1996), S. 11-14 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60 ; 52.90
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A radiofrequency excited atomic Xe slab laser with an active volume of 2 × 10 × 300 mm3 using a quartz envelope containing the laser-gas mixture shows a stable cw performance with an output power of almost 1 W. The free-running system oscillates, depending on gas composition and density, on several lines between 1.73 and 3.51 μm. Line competition phenomena are observed. Single-line oscillation yields more than 500 mW.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01081241
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  • 21
    Digitale Medien
    Digitale Medien
    Imaging and analysis of photomechanical effects induced in water by high-power laser-target interaction (1996)
    Springer
    Applied physics 62 (1996), S. 503-510 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.80 ; 81.60 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The kinetics of cavitation and associated photo-mechanical effects induced by underwater pulsed-laser irradiation of solid targets has been studied experimentally and analyzed with theoretical methods. A xenon-chloride excimer laser of 150 ns pulse duration has been utilized to produce ablation and local photofragmentation of artificial samples of hard tissues at fluences of 12–24 J/cm2. The evolution of pressure wave and cavitation formations developing in the liquid from the target surface after laser irradiation has been observed with a time-resolved imaging technique employing a pump-probe laser arrangement. The analysis of experimental results has been performed by using the theoretical model of “point explosion” that has been successfully applied to fit the cavitation kinetics, providing also quantitative information on the energy transfer during photo-acoustic interactions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01081051
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  • 22
    Digitale Medien
    Digitale Medien
    Continuous-wave mode-locked solid-state lasers with enhanced spatial hole burning (1995)
    Springer
    Applied physics 61 (1995), S. 429-437 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.60 ; 42.55 ; 42.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We systematically investigate the difference between both actively and passively mode-locked lasers with Gain-at-the-End (GE) and Gain-in-the-Middle (GM) at the example of Nd:YLF lasers. The GE laser generates pulse widths approximately three times shorter than a comparable GM cavity. This is due to enhanced Spatial Hole Burning (SHB) which effectively flattens the saturated gain and allows for a larger lasing bandwidth compared to a GM cavity. We first investigate enhanced SHB by measuring the cw mode spectrum, where we have observed that the mode spacing in GE cavities depends primarily on the crystal length. This was also confirmed for a Nd:LSB crystal, where the pump absorption length was significantly shorter than the crystal length. In mode-locked operation, pulse widths of 4 ps for passive mode locking and 5 ps for active mode locking are demonstrated with GE cavities, compared to 11 ps for passive and 17 ps for active mode locking with GM cavities. Additionally, the time-bandwidth product for the GE cavity is approximately twice the ideal product for a sech2 pulse shape and cannot be improved by dispersion compensation alone, while the GM cavity has nearly ideal time-bandwidth-limited performance. The results for the GM cavity compare well to existing theories taking into account the added effect of pump-power-dependent gain bandwidth which increases the bandwidth of Nd: YLF from 360 to 〉 500 GHz. In a following paper [1] (called Part II) a rigorous theoretical treatment of the effects due to SHB will be presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01081271
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  • 23
    Digitale Medien
    Digitale Medien
    Performance studies of a pulsed HF laser with a sliding discharge plasma cathode (1996)
    Springer
    Applied physics 62 (1996), S. 357-365 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The plasma electrode design concept is applied for the first time to an HF laser. The discharge along the surface of a dielectric (sliding discharge) is used as a plasma cathode for the main laser discharge. The laser operates at atmospheric pressure with a gas mixture of He/SF6/C3H8. Details are presented on the efficiency of energy transfer, the dependence of laser performance on circuit parameters, gas mixture, relative energy loading and time delay between the plasma electrode and main discharges. The F atom production rate is estimated from the linear dependence of the output energy on the electric charge passed through the discharge. Output energies of 600 mJ were obtained at 1.6% efficiency from a small active discharge of 108 cm3 volume and 38 cm length, while the maximum specific input and output energies were 370 J/1 and 5.7 J/1, respectively. These values compare favourably with those reported in the literature for non-chain-reaction-type gas mixtures at 1 atm pressure and demonstrate that the plasma electrode design is a powerful scheme for developing gas-discharge lasers.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01081197
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  • 24
    Digitale Medien
    Digitale Medien
    A magnetically stabilized coaxial laser discharge (1981)
    Springer
    Applied physics 26 (1981), S. 161-167 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 52.80 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A new magnetic discharge stabilization technique for coaxial laser systems is described. The approach utilizes crosses electric and magnetic fields to create and maintain a large and rapidly rotating plasma volume which does not experience glow-to-arc transitions. Very high cw specific discharge power loadings have been achieved even without the benefit of external gas cooling or circulation. Performance is insensitive to gas composition and pressure such that high power coaxial discharges have been run in CO2 laser gas mixtures up to several hundred torr. Stable cw discharges have also been obtained in mixtures containing several torr of SF6. The technique appears to be readily scalable to give very large excited volumes in systems with comparatively small overall physical dimensions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00692441
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  • 25
    Digitale Medien
    Digitale Medien
    Population inversion in thallium by flashlamp-photodissociation of TII (1983)
    Springer
    Applied physics 32 (1983), S. 83-84 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 33.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A population inversion between the 62 P 3/2 and 62 P 1/2 state of thallium has been achieved for the first time by incoherent photodissociation of TII. This is accomplished by using wall-ablating flashlamps of short risetime and appropriate light filtering. The inversion lasts about 4 μs and is terminated by quenching collisions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688548
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  • 26
    Digitale Medien
    Digitale Medien
    The vibrational relaxation time constant for theB v=0 level of XeCl (1983)
    Springer
    Applied physics 32 (1983), S. 193-198 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 33 ; 82.50
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The vibrational relaxation time constant for theB v=0 vibrational level of XeCl* has been investigated by observing the coupling between theB v=1 andB v=0 vibrational levels under saturated lasing conditions. Based on this observation, estimates of the expected extraction efficiency from theB-state have been made.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688287
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  • 27
    Digitale Medien
    Digitale Medien
    Transverse mode dynamics in a free-electron laser (1984)
    Springer
    Applied physics 33 (1984), S. 9-16 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.60 ; 42.20 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We derive the most general equations of motion for the electrons and the electromagnetic field in a free-electron laser including the effects of diffraction and pulse propagation. The field evolution is expressed in terms of the amplitudes and phases of a complete set of transverse modes. The analytic solution is given in the small-signal regime, where the theory is shown to be in excellent agreement with a recent experiment at Orsay.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00690020
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  • 28
    Digitale Medien
    Digitale Medien
    Pressure dependence of laser oscillation and superfluorescent emission from an optically pumped CF4 laser (1984)
    Springer
    Applied physics 34 (1984), S. 37-41 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Experiments on pressure dependence of a CF4 laser have been carried out to elucidate dynamic characteristics of CF4 molecules pumped by CO2 lasers. The results are followed by a model calculation which characterizes collisional quenching of the energy levels related to the stimulated emission. The enhancement of the laser output induced by buffer-gas addition, which was found under specific conditions, is discussed in relation to the competition between laser and superfluorescent emissions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697463
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  • 29
    Digitale Medien
    Digitale Medien
    Long wavelength operation of a CW CO-laser up to 8.18 μm (1981)
    Springer
    Applied physics 26 (1981), S. 73-76 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 07 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A liquid nitrogen cooled cw CO-Laser is described, with which laser action up to 8.18 μm (v=36→35) has been achieved.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00702691
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  • 30
    Digitale Medien
    Digitale Medien
    Design criteria and operating characteristics of a single-mode pulsed dye laser (1981)
    Springer
    Applied physics 26 (1981), S. 141-146 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We have designed and tested a pulsed single-mode dye laser for spectroscopy experiments. The dye laser is pumped by a 6 kHz copper vapor laser to produce up to 230 mW average power at over 5% efficiency in a nearly diffraction limited beam. The dye laser pulse closely resembles the 30 ns pump pulse. Using an electronic servo loop, the 60 MHz wide line can be scanned, without mode hopping, through the 16 GHz permitted by the travel on the piezo driven mirror mount.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01284915
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  • 31
    Digitale Medien
    Digitale Medien
    Free electron laser (1982)
    Springer
    Applied physics 28 (1982), S. 150-154 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697840
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  • 32
    Digitale Medien
    Digitale Medien
    Further study of continuous-wave CO flame chemical laser of the CS2/O2/N2O type (1983)
    Springer
    Applied physics 30 (1983), S. 29-33 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract This report describes an experimental examination of the output characteristics of the continuous-wave (cw) carbon monoxide flame chemical laser (FCL) of the CS2/O2/N2O type in case of small CS2/O2 reactants ratios (tipically CS2/O2≦1/10). A linear burner which gives a homogeneous and stable flame was used during the experimental study. The measurements of temperature distribution in CS2/O2 as well as CS2/O2/N2O flames show maximum temperatures of 1040 and 890 K, respectively. The addition of nitrous oxide (N2O) leads to dramatically enhanced output laser power caused primarily by V−V transfer processes. A chemical efficiency, based on the reaction O+CS→CO*+S, of 3% was achieved. The spectral composition of the CO FCL of the CS2/O2/N2O type shows lasing in the region from 5.130 to 5.586 μm. Experimental results were obtained with a nondispersive optical cavity.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00692655
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  • 33
    Digitale Medien
    Digitale Medien
    FIR NH3 cascade laser excited by a Q-switch laser (1983)
    Springer
    Applied physics 31 (1983), S. 5-8 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Short FIR laser pulses of high repetition rate are obtained by pumping NH3 with the pulses of a passively Q-switched IR laser. The two cascade laser transitions observed show coupled relaxation oscillations. The pulse shapes and delay times are qualitatively in agreement with a four-level rate-equation model.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00693899
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  • 34
    Digitale Medien
    Digitale Medien
    Surface spectroscopy (1982)
    Springer
    Applied physics 28 (1982), S. 229-232 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 82.65 ; 68 ; 36.40 ; 78 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697849
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  • 35
    Digitale Medien
    Digitale Medien
    Guided waves and IR lasers (1982)
    Springer
    Applied physics 28 (1982), S. 283-289 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 85.60 ; 42.80 ; 42.55 ; 33
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697857
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  • 36
    Digitale Medien
    Digitale Medien
    Intense laser generation from an atomic-fluorine laser (1984)
    Springer
    Applied physics 33 (1984), S. 235-238 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract An intensive generation of radiation from a discharge-pumped atomic-fluorine gas laser is reported. A peak power exceeding 330 kW and a total energy of more than 2 mJ is obtained for a number of lines in the red, using a NF3∶He (1∶100) gas mixture at total pressure of 500 Torr. The circuitry optimization is described and the conditions for effective operation of the atomic-fluorine laser are discussed. The temporal and the spectral characteristics of the laser emission are also presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697333
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  • 37
    Digitale Medien
    Digitale Medien
    Free electron laser (1982)
    Springer
    Applied physics 29 (1982), S. 157-158 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.60 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688657
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  • 38
    Digitale Medien
    Digitale Medien
    New lasers and laser schemes (1982)
    Springer
    Applied physics 29 (1982), S. 143-148 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.60 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Conclusion We have demonstrated the existence of an anomalous polarization coupling mechanism present in the injection locked TEA CO2 laser. As a direct consequence of this work, a new injection technique has been formulated which permits efficient injection coupling and maximises energy extraction whilst eliminating the detrimental optical feedback effects to which other injection locking systems are prone.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688654
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  • 39
    Digitale Medien
    Digitale Medien
    Energy transfer in slab dye lasers (1984)
    Springer
    Applied physics 35 (1984), S. 71-75 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.60 ; 42.55 ; 42.72
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A simple model of the energy transfer between a booster dye and the active dye in a flashlamp pumped planar waveguide dye laser is described. Analytical results are compared with experiments for several dyes in the 600–650 nm region. A twofold increase of laser output was found at a wavelength (630 nm) which is of particular interest for several applications.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697425
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  • 40
    Digitale Medien
    Digitale Medien
    Self-phase locking in lasers with homogeneously broadened emission lines (1984)
    Springer
    Applied physics 33 (1984), S. 187-193 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.50 ; 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract It is shown by numerical analysis based on Lamb's equations of motion, that standing-wave lasers with purely homogeneously broadened emission lines exhibit regular multimode oscillations. Specifically, modes lying far from the line centre are quenched due to mode competition, and the amplitudes of the oscillating modes approach steady-state values. The stabilization of the amplitudes is normally accompanied, or followed, by an evolution of the phases towards a phase-locked regime, where the relative phasesψ n = 2φ n −φ n + 1 −φ n − 1 [φ n phase in then th mode, defined by (6)] attain either the value 0 or ± π. The build-up times for the relative phases are found to vary over a wide range.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688527
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  • 41
    Digitale Medien
    Digitale Medien
    Improved gain on the Cl2(D′3 П g −A′3 П u ) transition at 258 nm by halogen donor mixing (1984)
    Springer
    Applied physics 35 (1984), S. 11-15 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The temporal development of the small-signal gain on the Cl2(D′−A′) transition at 258 nm has been investigated by means of an amplified spontaneous emission (ASE) technique. For electron beam pumped He/Cl2 mixtures, the gain appears only at the end of the pumping pulse, whereas for He/Cl2/CCl4 mixtures the temporal gain profile coincides with the fluorescence pulse, and the maximum gain coefficient increases by about a factor of two. The observed effects are due to the mixing of both halogen donors and can be explained by considering the quenching of theD′-state by electrons.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697515
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  • 42
    Digitale Medien
    Digitale Medien
    Theory of the synchronously pumped picosecond dye laser (1982)
    Springer
    Applied physics 27 (1982), S. 27-37 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The circulation of a synchronously mode locked dye laser pulse in a linear cavity configuration containing a dye cell as an active medium and a bandwidth-limiting element is treated. The condition that the pulse shape reproduces after each cavity round-trip provides a nonlinear integro-differential equation for the steady-state pulse shape. For the solution of this equation an approximate method, not limited to small pulse energies, is given and the pulse duration, intensity, energy, asymmetry of the pulse shape, stable regions and other interesting parameters are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697293
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  • 43
    Digitale Medien
    Digitale Medien
    The He/Cl2 laser at 258 nm (1982)
    Springer
    Applied physics 27 (1982), S. 49-55 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 34 ; 33
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Lasing from e-beam pumped He/Cl2 mixtures at 258 nm was investigated in a longitudinal pumping geometry. Time dependence, output powers and energies as well as the spectral composition of the laser pulses were determined for different experimental conditions. Optical gain was observed for eight transitions around 258 nm. The fine structure results from isotopic splitting and contributions from different vibrational states. No bottle-necking occurs. However, saturation and absorption by excited states limited the total output power to 6MW and the output energies to 200 mJ. A simple kinetic model is proposed that reproduces the larger number of experimental data quite sufficiently.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697296
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  • 44
    Digitale Medien
    Digitale Medien
    A one joule, XeCl pumped dye laser (1981)
    Springer
    Applied physics 26 (1981), S. 31-32 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A 4 J XeCl (308 nm) laser has been used to produce ∼ 1 J of dye laser output from selected dyes whose lasing wavelengths sample the spectral range from 330 to 600 nm.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00702683
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  • 45
    Digitale Medien
    Digitale Medien
    Resonant pumping far-infrared NH3 laser (1981)
    Springer
    Applied physics 26 (1981), S. 33-36 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 33 ; 34
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A far-infrared (FIR) NH3 laser was resonantly pumped with a line-tunable infrared (IR) NH3 laser. The number of the observed FIR laser lines amounted to 33. Most of them belonged toaR(J,K) rotation-inversion transition in (0, 1, 0, 0) vibrational state. The line tunability of sealed-off FIR NH3 laser was almost achieved in 90, 115, 150, and 220 μm wavelength regions by the selective line tuning of the pumping IR NH3 laser.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00702684
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  • 46
    Digitale Medien
    Digitale Medien
    Ultra-violet excited laser emission in Na2 (1982)
    Springer
    Applied physics 29 (1982), S. 195-200 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 35
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Laser emission at different wavelengths in the range of 903–914 nm and around 2.5 μm has been observed upon excitation of Na2 by uv radiation from an excimer laser at 351 nm and an excimer pumped dye laser in this wavelength range. The emission is attributed to a cascade emission $$C^1 \Pi _u \to 2^1 \sum _g^ + $$ followed by $$2^1 \sum _g^ + \to A^1 \sum _u^ + $$ . In addition, coupled with the laser emission around 910 nm, broad-band fluorescence peaking around 855.5 nm is observed which, eventually, may be the first observation of the $$b^3 \sum _g^ + \to x^3 \sum _u^ + $$ bound-free transition in Na2.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688667
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  • 47
    Digitale Medien
    Digitale Medien
    Theory of passively mode-locked cw dye lasers (1982)
    Springer
    Applied physics 27 (1982), S. 105-113 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The circulation of an ultrashort light pulse in a continuously pumped modelocked dye laser with a linear cavity configuration containing the active dye, the saturable absorber and a bandwidth-limiting elements is treated. The steady-state condition that the pulse shape reproduces after each cavity round-trip leads to a nonlinear integro-differential equation for this pulse shape. An approximate method for the solution of this equation not limited to the case of low laser gain and small pulse energies is given. The stable single pulse region and characteristic pulse parameters, as energy, duration, intensity and asymmetry, are considered in dependence on the laser parameters.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697557
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  • 48
    Digitale Medien
    Digitale Medien
    On the theory of electron motion due to superposed em waves and its application to the free-electron laser with linear polarization (1982)
    Springer
    Applied physics 28 (1982), S. 15-20 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 41
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The relativistic motion of a charged particle in an electromagnetic field depending only on one coordinate is shown to be exactly equivalent to the unidimensional motion of a particle having a time and space-varying mass. By means of the averaged Lagrangian method an approximate solution is obtained for the relativistic electron motion in two oppositely moving waves of any polarization, one of them being weaker than the other one, thus generalizing the results previously obtained for circular polarization. A comparison with numerical calculations shows a good agreement. A pendulum-like motion in an effective periodic potential is shown to exist not only for two waves of the same frequency, but more generally when the frequency of the weaker wave is an odd harmonic of the frequency of the stronger one.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00693886
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  • 49
    Digitale Medien
    Digitale Medien
    A subpicosecond dye laser pumped by a xenon ion laser (1984)
    Springer
    Applied physics 34 (1984), S. 191-192 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A pulsed xenon ion laser has been used to pump a rhodamine 6G dye laser utilizing a ring resonator. The dye laser has been passively mode-locked; a pulsewidth of 0.5 ps and a 50 kW peak power have been obtained.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697634
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  • 50
    Digitale Medien
    Digitale Medien
    Novel quantum-electronics phenomena and devices (1982)
    Springer
    Applied physics 29 (1982), S. 152-156 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.80 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688656
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  • 51
    Digitale Medien
    Digitale Medien
    Optimization of the UV CuII laser (1981)
    Springer
    Applied physics 26 (1981), S. 49-56 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 52.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The cw output power of the uv CuII laser has been optimized with respect to the hollow cathode geometry, the discharge current, the fill gas pressure and the resonator mirror parameters. A maximum laser output power of 900 mW for multiline operation at 248.6, 259.1, 260.0, and 270.3 nm was achieved with 100 A discharge current, 260 V voltage and 16 mbar fillgas pressure, when a hollow cathode of 1.2 m length and 2×6 mm2 cross section was employed. The single-pass pain gl has been estimated to 7%. A hollow cathode cross section of 1.5×4.5 mm2 is suggested as an optimum geometry. In addition, some investigations on the mechanism of the laser power decay in Ne−Cu-discharges are presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00702687
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  • 52
    Digitale Medien
    Digitale Medien
    Single picosecond-pulse generation in a mode-locked oscillator and regenerative amplifier system (1981)
    Springer
    Applied physics 26 (1981), S. 239-242 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A mode-locked Nd-glass laser oscillator with intra-cavity pulse selection by a Pockels cell shutter is described. A regenerative amplifier system with a saturable absorber is used to shorten the selected light pulses from the master oscillator. Pulses were shortened from 8 ps to 1 ps.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00692544
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  • 53
    Digitale Medien
    Digitale Medien
    Electron dynamics in free electron laser resonator modes (1982)
    Springer
    Applied physics 29 (1982), S. 101-109 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.50 ; 42.55 ; 52.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We study the electron phase-space evolution and gain in free electron lasers whose short-wavelength radiation has Gaussian spherial wavefronts. Several free electron laser designs are considered: the undulator, the tapered wavelength undulator, and the optical klystron. We find that the gain spectrum is no longer proportional to the slope of the forward spontaneous emission spectrum, and we determine the design of the Gaussian mode which maximizes the energy extraction from the electron beam.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00692771
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  • 54
    Digitale Medien
    Digitale Medien
    Spectral properties of diode-pumped non-planar monolithic Nd:YAG ring lasers (1995)
    Springer
    Applied physics 61 (1995), S. 243-248 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The coherence length of a single-frequency monolithic Nd:YAG ring laser is determined by using a highly unbalanced all-fiber Mach-Zehnder interferometer. A coherence length larger than ⋍ 1500km and a 3 dB linewidth less than ⋍ 60 Hz is estimated. Furthermore, an easy method to measure the temperature dependence on several laser parameters is described. This method is based on the laser emission in multiple axial modes, which is enforced by coherent optical feedback. A model explaining the multimode behaviour is presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01082042
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  • 55
    Digitale Medien
    Digitale Medien
    Measurements of collisional quenching of hydrogen atoms in an atmospheric-pressure hydrogen oxygen flame by picosecond laser-induced fluorescence (1995)
    Springer
    Applied physics 61 (1995), S. 479-487 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 32.50 ; 33.50 ; 35.80 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Atomic hydrogen has been probed in a hydrogen/oxygen flame at atmospheric pressure by use of two-photon, picosecond Laser-Induced Fluorescence (LIF). The fluorescence was detected and temporally resolved by a streak camera with a temporal resolution of a few ps which allowed determination of the collisionally quenched lifetime of then = 3 level of atomic hydrogen. The measurements were performed for three flame stoichiometries,φ = 1.4, 2.0 and 3.5, and were spatially resolved with respect to the reaction zone. The evaluated lifetime was found to vary rapidly in the reaction zone from 60 to 105 ps just above and then levelled out at 90 ps throughout the post-flame region. Power dependence measurements of the fluorescence signal indicated the presence of other phenomena, such as saturation, ionization and photodissociation. Since an inverted population is created between then = 3 and then = 2 level, Stimulated Emission (SE) of considerable magnitude occurred and was studied temporally resolved using the streak camera. The LIF and SE signal strengths for individual laser pulses were recorded in order to analyse a possible anti-correlation between the LIF and the SE.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01081277
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  • 56
    Digitale Medien
    Digitale Medien
    Comparative study of spectral narrowing of a pulsed Ti:Sapphire laser using pulsed and CW injection seeding (1996)
    Springer
    Applied physics 62 (1996), S. 51-57 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We report a comparative study of a pulsed as well as continuous-wave (cw) injection seeding of a Ti:Sapphire laser pumped by aQ-switched frequency-doubled Nd3+:YAG laser for achieving narrow spectral bandwidth. The results have indicated that the Ti:Sapphire laser using either a pulsed or a cw injection seeding could achieve efficient energy extraction in a narrow spectral bandwidth. In the case of pulsed injection seeding, the injection energy required for the complete injection seeding critically depended upon the timing of the Ti:Sapphire laser with respect to the delayed onset of the slave laser. On the other hand, in the case of cw injection seeding, the spectral bandwidth of the Ti:Sapphire laser was efficiently narrowed down to approximately 0.01 cm−1 with an injection power of less than 1 mW. In both types of injection seeding, characteristics observed experimentally were compared with those obtained by a numerical simulation code based on the one-dimensional rate-equation model.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01081247
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  • 57
    Digitale Medien
    Digitale Medien
    Theoretical and experimental investigation of a waveguide CO2 laser with radio-frequency excitation (1996)
    Springer
    Applied physics 62 (1996), S. 113-127 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 52.00 ; 34.80 ; 52.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A comprehensive experimental and theoretical study of the optimization of a continuous-wave radiofrequency (rf) excited CO2 waveguide laser is presented. The numerical simulation includes the modelling of the gas-discharge plasma parameters like the plasma impedance and energy deposition, the laser kinetics and finally the influence of the resonator feedback on the lasing process. Along with this theoretical study, an extensive experimental research program enabled us to optimize the laser performance of the CO2 waveguide laser. As a result, a total output power of 42 W and a specific output power of 1.1 W/cm were obtained.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01081112
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  • 58
    Digitale Medien
    Digitale Medien
    Long lifetime operation of an ArF-excimer laser (1996)
    Springer
    Applied physics 63 (1996), S. 229-235 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract An experimental investigation to improve the lifetime of a discharge-excited ArF-excimer laser is presented. The three dominant factors restricting its lifetime are CF4 generation in the laser gas, color-center formation in the optics and input power density reduction due to electrode ablation. Copper electrodes were superior to nickel electrodes in regard to electrode ablation. A gas lifetime of more than 109 shots (about one month at 400 Hz) is shown for an ArF-excimer laser with a liquid-nitrogen trap and high-temperature zirconium alloy trap.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01833791
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  • 59
    Digitale Medien
    Digitale Medien
    The effect of mid-infrared and far-infrared emission, generated at NH3 excitation by intense radiation of a TEA CO2 laser, on ammonia absorption (1996)
    Springer
    Applied physics 63 (1996), S. 355-361 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 33.00 ; 42.55 ; 42.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The effect of Mid-InfraRed (MIR) (λ ≅ 12 μm) and Far-InfraRed (FIR) (λ ≽ 100 μm) emission from excited ammonia on the absorption of intense radiation of a TEA CO2 laser has been studied experimentally under collisional and collisionless excitation conditions with ammonia pressures from 0.5 to 0.03 Torr. The energy of MIR and FIR emission was studied as a function of NH3 pressure and laser energy fluence. Particular emphasis was given to the kinetics of MIR and FIR emission generation at different NH3 pressures and to the measurement of the time delay of re-emitted pulses relative to the exciting CO2 laser pulse. It has been found that the re-emission in the MIR range is highly collisional in nature. The intensity of MIR emission drops sharply (asp 3) with decreasing NH3 pressure and its delay time relative to the exciting laser pulse increases. At the same time, re-emission in the FIR range (in the case of resonant excitation of NH3 at the 9R (30) line of CO2 laser) is observed during an exciting pulse up top 〈 0.03 Torr. When binding the rotational sub-levels of a molecule with transitions, FIR emission acts as rotational relaxation and thus leads to an increase in NH3 IR absorption even at collisionless excitation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01828738
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  • 60
    Digitale Medien
    Digitale Medien
    Repetitive passive Q-switching and bistability in lasers with saturable absorbers (1983)
    Springer
    Applied physics 30 (1983), S. 57-77 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We report detailed experimental data on the passive Q-switching operation in a CO2 laser with CH3I saturable absorber, and on the transient behaviour in the near-Q-switching situation. Under suitable operating conditions, we found bistability in the output power. In some cases, we observed the simultaneous presence of bistability and passive Q-switching. The theoretical part of the paper starts from the four-level model of laser with saturable absorber, as formulated by other authors. By adiabatically eliminating the variables of the resonant levels, we reduce the problem to a set of three differential equations, from which we derive explicit analytical conditions for the rise of passive Q-switching. These conditions turn out to be in good qualitative and partially quantitative agreement with our experimental findings as well as with other experimental data previously obtained by other authors. Finally we classify the possible combinations of passive Q-switching and bistability that one can find in this type of experiments.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688479
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  • 61
    Digitale Medien
    Digitale Medien
    Dye stability under excimer-laser pumping (1983)
    Springer
    Applied physics 30 (1983), S. 109-116 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 33 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The stability of polymethine dyes under XeCl laser excitation has been investigated. (For these dyes emitting in the ir the difference between absorbed and emitted photoenergy is 2 eV.) The stability was measured in an amplifier device operating in the saturated regime. While the influence on dye concentration is negligible, the fluence dependence shows the importance of two photon absorptions. A meausure for the stability is the number of photons which can be emitted per dye molecule before the dye solution has degraded to 50% of the initial value. This value is in the range of 150–280. The stability is clearly related to the formation of photoproducts absorbing at the pump and the laser wavelength. A model starting from the change in the dye solution absorption spectra is in very good agreement with the observed energy decays.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00695464
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  • 62
    Digitale Medien
    Digitale Medien
    A new blue-green XeF (C→A) excimer laser amplifier concept (1984)
    Springer
    Applied physics 35 (1984), S. 227-231 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The feasibility of using the electrically excited XeF(C»A) excimer medium as an efficient wideband amplifier in the blue-green region of the spectrum has been investigated. Calculations show that for an intense blue-green optical flux input the amplification characteristics of XeF(C»A) improve, as a result of both bleaching of the pump induced absorbers and by additional production of XeF(C) level population. The removal of one of the major absorbing species, Xe** in the XeF (C»A) laser mixture by means of a pulsed ruby laser probe beam has been demonstrated.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00693931
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  • 63
    Digitale Medien
    Digitale Medien
    High-efficiency multicolour Q-switched Nd3+:KGd(WO4)2 laser (1995)
    Springer
    Applied physics 61 (1995), S. 213-215 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Energy output of 400 mJ, an order of magnitude higher than reported previously is obtained in aQ-switched flashlamp-pumped Nd3+:KGd(WO4)2 laser. No pronounced saturation of the output energy with respect to the pump energy is observed. Multiwavelength operation due to efficient Stokes conversion in the laser crystal is demonstrated.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01090946
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  • 64
    Digitale Medien
    Digitale Medien
    Efficient vacuum-ultraviolet generation by anti-Stokes Raman scattering using a cryogenic Raman cell (1995)
    Springer
    Applied physics 61 (1995), S. 319-323 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.65 ; 42.55 ; 07.60 ; 07.20
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We have investigated the increase of efficiency for high-order anti-Stokes Raman scattering using a cryogenic Raman cell. By cooling the cell to liquid-nitrogen temperature, output energies of the 9th-order anti-Stokes wave at 133 nm in normal hydrogen were enhanced by a factor of 10, and the 11th-order anti-Stokes line at 141 nm in normal deuterium appeared, while no output was observed at room temperature. No output energy enhancement, however, was obtained using cooled para-hydrogen as a result of multiple rotational Raman scattering. For long-term operation, the output window surface of the Raman cell was kept at above 200 K in order to protect it from deposition, the absorption of which is detrimental to VUV transmission.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01081530
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  • 65
    Digitale Medien
    Digitale Medien
    Continuous operation up to 3 kHz in a discharge-pumped XeCl excimer laser (1996)
    Springer
    Applied physics 63 (1996), S. 1-7 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Continuous operations at a high repetition rate up to 3 kHz for discharge-pumped XeCl excimer laser are presented. The dependence of the clearing ratio on laser-gas pressure and input energy densities is studied. It was found that suitable laser-gas pressures minimize the clearing ratio for various input-energy densities. It is also shown that few density disturbances in the discharge region are induced by gas heating in a discharge-pumped XeCl excimer laser with low input-energy density
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01112828
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  • 66
    Digitale Medien
    Digitale Medien
    Ti:Sapphire-pumped femtosecond optical parametric oscillators based on KTiOPO4 and RTiOAsO4 (1995)
    Springer
    Applied physics 60 (1995), S. 437-442 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.65 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The design, configuration and operation of Ti:Sapphire-laser-pumped femtosecond Optical Parametric Oscillators (OPOs) using KTP and RTA are described. The results presented include configurations capable of producing transform-limited pulses shorter than 40 fs and operating with pump powers as low as 50 mW. Tunability within the 1–3 µn spectral region is demonstrated using pump-tuning alone.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01081323
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  • 67
    Digitale Medien
    Digitale Medien
    New UV tunable solid-state lasers for lidar applications (1995)
    Springer
    Applied physics 61 (1995), S. 117-120 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60 ; 92.60 ; 92.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We present the first lidar/DIAL system based on an Ultra Violet (UV) vibronic laser. A Nd:YAG-pumped Ce:LiSAF laser has been developed for this purpose, providing high pulse energy (5 mJ at 10 Hz), very high slope efficiency (33%), and a tuning range from 284 to 299 nm. Simultaneous measurements of SO2 and O3 concentration profiles are presented using this frequency-agile Ce:LiSAF-based lidar system.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01090981
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  • 68
    Digitale Medien
    Digitale Medien
    Continuous-wave mode-locked solid-state lasers with enhanced spatial hole burning (1995)
    Springer
    Applied physics 61 (1995), S. 569-579 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.60 ; 42.55 ; 42.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract In Part I of this paper [1] experimental results were presented and discussed. In this part, we investigate theoretically the dynamics of end-pumped solid-state lasers due to enhanced spatial hole burning. This becomes possible by a fast numerical implementation of the saturated gain in the presence of strong spatial hole burning that allows to treat the multimode case for an arbitrary pumping level. We find for a wide range of laser parameters that the mode spacing of the cw running modes is essentially determined by the length of the gain medium and only weakly depends on the absorption depth of the pump transition. It is shown that spatial hole burning can lead to a completely flat saturated gain profile over half of the gain bandwidth. In mode-locked lasers, the flat gain due to spatial hole burning results in shorter pulses. But the pulses are neither Gaussian-nor sech-shaped as they are in actively or passively mode-locked lasers without spatial hole burning. Further, we show that soliton-like pulse shaping can be used to restore a transform-limited sech-shaped pulse in an end-pumped solid-state laser while exploiting the full gain bandwidth of the laser material.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01091215
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  • 69
    Digitale Medien
    Digitale Medien
    Frequency control of a dual-pulse-pumped dye laser by combination of external injection and intracavity self-injection of radiation (1996)
    Springer
    Applied physics 62 (1996), S. 91-95 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A technique is proposed for injection-seeding control of tunable lasers. It is based on a combination of successive external injection and intracavity self-injection of radiation when the active medium is pumped by dual-step pulses. The technique is tested both experimentally (in the case of Nd:YAG-laser-pumped pulsed dye lasers) and numerically, using a model developed by us. Full conversion of the broadband spectrum into the injected line is achieved for an output energy greater by a factor of about 50 than that managed by means of the traditional injection-seeding technique under identical conditions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01081254
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  • 70
    Digitale Medien
    Digitale Medien
    Operation of KrF and ArF tunable excimer lasers without Cassegrain optics (1996)
    Springer
    Applied physics 62 (1996), S. 241-247 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A commercial tunable excimer laser consists of an oscillator-amplifier combination. The oscillator produces high-quality light that is sent to the amplifier and is distributed throughout the amplifier cavity via Cassegrain optics. We describe here two alternative approaches, a “single-pass” configuration for use with KrF and a “triple-pass” configuration with ArF, both of which do away with the Cassegrain optics. In each approach, the beam energy is the same as with Cassegrain optics. For KrF, the changes provide better locking, a higher degree of linear polarization, and a better spatial beam homogeneity, but a poorer beam divergence. For ArF, there is also better beam homogeneity, but the locking efficiency and divergence are not as good as with Cassegrain optics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01080951
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  • 71
    Digitale Medien
    Digitale Medien
    A high average power rotating hollow cylinder Nd : glass laser (1996)
    Springer
    Applied physics 63 (1996), S. 585-591 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The rotating hollow cylinder glass laser is one of the approaches for the generation of high average output powers scaling to kilowatt levels from solid-state laser materials. An analytical solution of the heat conduction equation is presented for a thin wall, infinitely long glass medium, with boundary conditions given by Newton's law of cooling. The theoretical result is applied to predict thermal effects of this geometry which ultimately limit the laser performance, and the design of such a laser. A flashlamp pumped rotating Nd-doped phosphate glass hollow cylinder laser has been demonstrated. An average power output of 300 W has been achieved at 3.8% slope efficiency and 2.6% overall efficiency. Our investigation shows that the development of a kilowatt average power rotating cylinder laser is feasible.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01830997
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  • 72
    Digitale Medien
    Digitale Medien
    Theory of passive mode-locking of CW dye lasers with contacted and non-contacted absorbers (1981)
    Springer
    Applied physics 26 (1981), S. 197-202 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A theoretical treatment of the influence of a saturable absorber in close contact with a highly reflecting mirror on a light pulse is given. The shaping of a Gaussian pulse during a single passage through such an absorber is calculated for various absorber lengths. The influence of absorber position and length on the pulse parameters and the stability of a continuously pumped dye laser are investigated. The shortest pulses and the most favourable operation conditions of the laser are to be expected in the case of a short contacted saturable absorber.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00692447
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  • 73
    Digitale Medien
    Digitale Medien
    Waveguide CW 118.6 μm H2O laser (1982)
    Springer
    Applied physics 27 (1982), S. 123-128 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract This paper reports results of an experimental study of a cw 118.6 μm H2O waveguide laser. The laser cavity is a 3 cm inner diameter, 3.2 m long Pyrex tube, with plane reflectors against its ends, one of them being a copper mesh coupler. The active medium is a H2O:H2 gas mixture. Successive optimizations lead to a reliable output power of 50 mW, for the EH11 mode. The power density is the highest ever reported, and the stability is such that the power drifts by less than 2% per hour. This laser is competitive with the optically pumped 118.8 μm CH3OH laser.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00694636
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  • 74
    Digitale Medien
    Digitale Medien
    Picosecond pulse transmission in germanium of various thicknesses (1982)
    Springer
    Applied physics 27 (1982), S. 201-205 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.10 ; 42.55 ; 78.20
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The transmission of ultrashort pulses from a mode-locked Nd: glass laser in germanium of various thicknesses (3 to 8 μm) has been measured as a function of incident irradiance. Transmission is seen to increase with irradiance level in all samples. The degree of enhancement is greater for the thcker samples. At high excitation levels, thinner samples show a peaking of transmission, which does not occur in a thick sample. Taking the sample as composed of thin elements, the parameters characterizing the photoexcited electron-hole plasma have been found by assuming homogeneous excitation within each element. Theoretical curves thus obtained give good quantitative account of the experimental results. Peaking of transmission is seen to due to a balance between absorption enhancement in the front portion of the sample and absorption reduction in the back.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697442
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  • 75
    Digitale Medien
    Digitale Medien
    Optically pumped14NH3 laser and its stark tuning at 10.78 μm (1982)
    Springer
    Applied physics 28 (1982), S. 55-62 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 33 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Infrared (ir) emissions from a TEA-CO2-laser-pumped NH3 laser are reported. Superfluorescent emissions and selective single-line oscillations have been obtained in the range from 11 to 13 μm. The results make possible the design of a NH3 Stark cell allowing a 1 GHz shift of the 10.78 μm NH3 emission line.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00693893
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  • 76
    Digitale Medien
    Digitale Medien
    Rotating-disk diode-pumped continuous-wave Nd:YAG laser (1995)
    Springer
    Applied physics 61 (1995), S. 525-528 
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    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Continuous-Wave (CW) diode-laser-pumped experiments using rotating Nd: YAG disk(s) have been performed in the input-power range of 1–6 W and rotation-speed range of 0–25 Hz. With a single Nd: YAG disk in the laser cavity, about 1.56 W of output power at 1.06 µm due to the Nd3+ (4 F 3/2−4 I 11/2) transition at an absorbed input power of 4.2 W has been observed, leading to an optical-to-optical conversion efficiency of over 37% and slope efficiency of 52% using 7.5% transmission output coupler. The laser output power has been observed to decrease by either increasing the number of Nd:YAG disks in the cavity or increasing the rotation speed of the disk(s).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01081284
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  • 77
    Digitale Medien
    Digitale Medien
    Laser-excited fluorescence of perylene by using self-induced second-harmonic and sum-frequency radiation emanating from high-power AlGaAs double hetero-type diodes (1996)
    Springer
    Applied physics 62 (1996), S. 557-561 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 79.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract High-power (12 W) pulse-operated AlGaAs double-heterostructure lasers with a large thickness of the active layer (1.5 µm) are able to produce internal second-harmonic and sum-frequency generation with a peak power of 10 mW. The corresponding portion of the electroluminescence spectra has a maximum at 405 nm. Clearly resolved mode structures of the fundamental and harmonic radiation are analysed in detail. Particular transverse modes exhibit different conversion efficiencies. Violet resonances without modal precursors in the infrared spectrum make a marked contribution to the light intensity. The harmonic signal serves as an excitation source in photoluminescence studies. A technique of single-photon counting is applied in order to perform spectral measurements under weak-intensity levels. Bright fluorescence spectra of saturated solution of perylene ino-xylene are presented. The spectrum obtained when the solution is illuminated with a gas discharge lamp shows no differences with respect to the positions of the intensity peaks. This allows us to suggest that AlGaAs high-power lasers can be used as convenient excitation sources in photophysics, in particular in time-resolved experiments.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01081694
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  • 78
    Digitale Medien
    Digitale Medien
    Counting of particles in aqueous solutions by laser-induced photoacoustic breakdown detection (1996)
    Springer
    Applied physics 63 (1996), S. 299-306 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.80 ; 82.70
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Laser-induced photoacoustic breakdown detection is applied for the determination of particles in aqueous dispersion. Polystyrene (latex), alumina and thoriasol particles of different sizes are investigated for demonstration. Laser pulses at 500 nm with 28 ns pulse width (FWHM), generated by an excimer (λ = 308 nm) pumped dye laser, are focused into aqueous particle dispersions to produce breakdown. The dye laser pulse energy is fixed at a value lower than the breakdown threshold of pure water to initiate a dielectric breakdown only when particles are present in a given focus volume. Focus volume parameters and particle size dependent breakdown thresholds are calculated and the results are compared with data from literature. Dependence of breakdown threshold values on the chemical composition of the particles is determined for polystyrene, alumina and thoriasol particles.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01833800
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  • 79
    Digitale Medien
    Digitale Medien
    Second-harmonic generation with traveling-wave pulses (1996)
    Springer
    Applied physics 63 (1996), S. 237-242 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.65 ; 42.70
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We experimentally studied properties of traveling-wave excitation and traveling-wave pulse compression for a Nd : glass laser system with a streak camera. These properties were extended to second-harmonic generation with a type-11 KDP crystal. We found that the second-harmonic pulse generated from the chirped-fundamental pulse also has a good chirp linearity, but the spectral bandwidth and temporal duration were reduced. We demonstrated the effective subpulse suppression in the compressed pulse with the second-harmonic generation. The pulse with tilted wave front, short wavelength and high contrast ratio can be obtained by the second-harmonic generation of traveling-wave pulse.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01833792
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  • 80
    Digitale Medien
    Digitale Medien
    Diode-pumped colour-centre lasers tunable in the 1.5 µm range (1996)
    Springer
    Applied physics 62 (1996), S. 437-442 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Under pumping with a 990 nm, 1 W laser diode, continuous-wave (cw) tunable laser emission in the 1.5 µm wavelength range was obtained from two different colour centres: Tl0(1) in NaCl:Tl+ and (F 2 + )H in NaCl:OH−. The results are compared to those recently obtained with a similar apparatus and Tl0(1) centres in KCl:Tl+. The highest output power (30 mW) and the broadest tuning range (1.48–1.68 µm) were achieved with (F 2 + )H centres.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01081041
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  • 81
    Digitale Medien
    Digitale Medien
    Michelson mode selectors and spatial hole burning in single-mode cw dye lasers (1981)
    Springer
    Applied physics 26 (1981), S. 133-140 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Single-mode selection with Michelson selectors in cw standing-wave dye lasers is analyzed. The application of single and double Michelson mode selectors for compensation of spatial hole burning effects is described in detail. Upper limits for the pumping are considered. It is shown that with spatial hole burning compensation, even the single Michelson selector provides sufficient selectivity for high power single-mode operation in linear cavities.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01284914
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  • 82
    Digitale Medien
    Digitale Medien
    Observation and assignment of submillimetre laser lines from CH3OH pumped by isotopic CO2 lasers (1982)
    Springer
    Applied physics 27 (1982), S. 19-25 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract New laser lines have been generated using methanol when isotopically labelled CO2 is used in the pump laser. 19 lines have been found when13C16O2 is used and 29 when12C18O2 is used. The wavelengths of the emission lines have been measured with a relative accuracy of 5×10−3 using the submillimetre resonator as a scanning Fabry-Perot interferometer, and the polarizations of the lines have also been measured. Some of the laser lines have been assigned to pure rotational transitions in the excited state associated with the CO stretching mode, other lines are believed to originate from pumping in combination bands.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697292
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  • 83
    Digitale Medien
    Digitale Medien
    A new method of measuring ultra-short coherent light pulses (1982)
    Springer
    Applied physics 27 (1982), S. 177-181 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A new method of pulse width measurement based on the total energy response of an etalon is presented. The theory is developed and results for several pulse shapes are given. The method is unique because no fast response detector is required and there are practically no spectral region limitations.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697437
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  • 84
    Digitale Medien
    Digitale Medien
    Applications of ps-pulses (1982)
    Springer
    Applied physics 28 (1982), S. 246-254 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.80 ; 42.65 ; 34 ; 42.55 ; 42.70 ; 78
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697852
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  • 85
    Digitale Medien
    Digitale Medien
    Theory II (1982)
    Springer
    Applied physics 28 (1982), S. 255-261 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 36.20 ; 36.10 ; 02 ; 36 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697853
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  • 86
    Digitale Medien
    Digitale Medien
    A simple method for single-frequency operation and stabilization of a He−Ne laser (1981)
    Springer
    Applied physics 26 (1981), S. 193-195 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A simple method for single-frequency operation and stabilization of a low power He−Ne laser has been described and used. With a proper resonator length very weak sideband modes on each side of the strong mode produce a feedback signal to a piezoelectric pusher which controls the resonator length. The long-term frequency stability was estimated to be about ±10 MHz.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00692446
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  • 87
    Digitale Medien
    Digitale Medien
    On a free-electron-laser in a uniform magnetic field. A solution for arbitrarily strong electromagnetic radiation fields (1982)
    Springer
    Applied physics 27 (1982), S. 15-18 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 41 ; 42.55 ; 95
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Exact expressions are derived for the gain of a free-electron laser based on a uniform longitudinal magnetic field configuration operating in the single-particle, low-gain regime. The gain is calculated for different parameters of the system. For strong enough a field, the gain decreases with an increase of the amplitude, becoming negative when passing a threshold value, which depends on the system parameters. Implications regarding the saturation of the lasing process are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697291
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  • 88
    Digitale Medien
    Digitale Medien
    Pure MW Raman laser emission in superradiant mode in ammonia by pumping with 9P20 CO2 laser line (1984)
    Springer
    Applied physics 34 (1984), S. 33-35 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 33.80 Bx ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract In this work, clear FIR Raman emission in ammonia was observed when a 9P20 CO2 line was used as a pump. We have noted an intense pump depletion and strong superradiant FIR and MIR emissions. The time history of these radiations has also been recorded. The intense MIR radiation is a new line observed in the ammonia laser.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697462
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  • 89
    Digitale Medien
    Digitale Medien
    Optical klystron experiments for the ACO storage ring Free Electron Laser (1984)
    Springer
    Applied physics 34 (1984), S. 207-219 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.60 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract To improve the gain in the Orsay storage ring Free Electron Laser (FEL) experiment, the 17 period permanent magnet undulator has been modified to form an optical klystron (OK). We report the measurement of spontaneous emission and the effects on it of energy spread and angular spread. Gain and laser induced bunch lengthening measurements with the OK are also reported and are in very good agreement with the FEL classical theory. The spontaneous emission spectrum which is easy to measure with good signal to noise ratio, turns out to be a very good diagnostic tool forenergy spread and angular spread measurements on storage rings. The factor of four increase in the small gain obtained by converting the undulator NOEL into an OK was the critical factor in the recent operation of the ACO storage ring laser above threshold.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697637
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  • 90
    Digitale Medien
    Digitale Medien
    Modulation of radiation in nonstationary resonant media (1983)
    Springer
    Applied physics 30 (1983), S. 41-45 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.80 ; 42.10 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We study the propagation of radiation in a gas, the resonant frequency of which changes with time when affected by external electric and magnetic fields. It is shown that for an harmonic change of the resonant frequency under appreciable energy exchange between electromagnetic field and medium, deep amplitude modulation of radiation may be achieved. The analytical expressions obtained for a field in a gas allow rather accurate calculation of the space-time structure of the radiation penetrated through the medium layer. The numerical calculations are compared with the known experiment [4], good agreement is obtained. The transformation of radiation between dispersive branches with adiabatic stepwise variation of the resonant frequency has been also studied. Branch-tobranch transformation is investigated and the adiabatic invariant is found to be the total number of the high and low frequency radiation quanta corresponding to two dispersive branches.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00692657
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  • 91
    Digitale Medien
    Digitale Medien
    Xe2Cl fluorescence and absorption in self-sustained discharge XeCl lasers (1984)
    Springer
    Applied physics 35 (1984), S. 167-172 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Fluorescence at 490 nm from the triatomic excimer Xe2Cl* has been investigated to determine the 308 nm absorption due to this species in an x-ray preionized, self-sustained gas discharge XeCl laser. The dependence of Xe2Cl* density on laser intensity (at 308 nm), buffer gas and Xe and HCl partial pressures has been determined for discharges with a peak electrical power deposition of 2.5 GWl−1. Xe2Cl* absorption is estimated to reach 0.6% cm−1 under non-lasing conditions but decreases to a non-saturable 0.2% cm−1 for intracavity laser intensity〉1 MW cm−2. XeCl* and Xe2Cl* fluorescence intensities were found to be a similar for both helium and neon buffer gases but laser output was a factor of two greater with a neon buffer.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697708
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  • 92
    Digitale Medien
    Digitale Medien
    cw far-infrared lasing in15NH3, stark resonantly pumped by a CO2 or N2O laser (1983)
    Springer
    Applied physics 32 (1983), S. 79-81 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 33 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract 48 new resonant pumping schemes, by ir Stark tuning, have been performed on15NH3, with cw CO2 and N2O lasers. Among the 25 different fir wavelengths obtained, 15 correspond to new emissions, raising thus to 45 the total number of cw fir emissions from this gas, in the presence of electric field.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688547
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  • 93
    Digitale Medien
    Digitale Medien
    New lasers II (1982)
    Springer
    Applied physics 28 (1982), S. 233-239 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.70 ; 42.55 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697850
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  • 94
    Digitale Medien
    Digitale Medien
    Laser fusion (1982)
    Springer
    Applied physics 28 (1982), S. 269-273 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 52 ; 42.55 ; 42.80 ; 51
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697855
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  • 95
    Digitale Medien
    Digitale Medien
    Optimization of dye-laser output coupling by consideration of the spatial gain distribution (1980)
    Springer
    Applied physics 22 (1980), S. 175-184 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract The problem of output-coupling optimization of a transversely or longitudinally pumped dye laser is treated in terms of a rate equation approach under steady state considerations. The theoretical study considers the spatial variation of the gain distribution and such typical features of a dye laser as reabsorption, triplet effects and excited state absorption. Numerical results obtained with realistic values of typical laser parameters (cross-sections for stimulated emission and reabsorption, number density of active molecules etc.) indicate that a higher degree of output coupling and consequently higher output powers are feasible upon a complete consideration of the spatial gain distribution
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00886002
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  • 96
    Digitale Medien
    Digitale Medien
    New TEA-lasers based onD′→A′ transitions in halogen monofluoride compounds: ClF (284.4 nm), BrF (354.5 nm), IF (490.8 nm) (1980)
    Springer
    Applied physics 23 (1980), S. 283-287 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 42.55 ; 42.80 ; 33
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract As an outcome of a systematic study of excitation kinetics and fluorescence spectra concerning theD′(3π2u )→A′(3π2g ) transitions in homonuclear diatomic halogens and corresponding transitions in interhalogen molecules [1], this paper describes, for the first time, TEA laser action in the three halogen monofluorides ClF, BrF, and IF. Output energies in the mJ range were demonstrated in a fast TEA discharge arrangement at the wavelengths of 284.4, 354.5, and 490.8 nm for ClF, BrF, and IF, respectively. The results suggest parameter scalability and wavelength tunability.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00914912
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  • 97
    Digitale Medien
    Digitale Medien
    Simultaneous operation at two different wavelengths of an PrLaP5O14 laser (1981)
    Springer
    Applied physics 24 (1981), S. 13-20 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 42.55 ; 78.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract Simultaneous laser operation at the wavelengths of λ1=637 and λ2=717 in Pr0.5La0.5P5O14 single crystals was observed. The crystals were excited by nanosecond publses from a Coumarin 2 dye laser (λ=450 nm). Laser emissions and their interdependence were studied both in crystals without an external resonator and in crystals placed within a plane parallel resonator. The energetic, time and frequency characteristics for both laser actions were examined. The effect of bifrequential emission was also found in crystals of different ratios of Pr and La ions concentration and in pure praseodymium pentaphosphate.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00900390
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  • 98
    Digitale Medien
    Digitale Medien
    The effect of substituting metal vapour with metal halide vapour in a hollow cathode laser discharge (1980)
    Springer
    Applied physics 21 (1980), S. 25-28 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 35 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract He−Zn and He−ZnCl2 hollow cathode discharges were compared. The metal vapour concentration necessary for laser operation can be achieved at a lower temperature for the molecular substance. On the other hand, the efficiency decreases because part of the He ions necessary for the selective excitation of the upper laser level of the metal ion are lost in the dissociation process.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00886479
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  • 99
    Digitale Medien
    Digitale Medien
    Application of pressure-tuned diode lasers to high-resolution spectroscopy (1980)
    Springer
    Applied physics 22 (1980), S. 241-243 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 07.65 ; 42.55 ; 42.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract The application of the high-pressure chamber with a pressure transmitting medium (liquid at room temperature) to diode-laser tuning was found to be a useful method for high-resolution spectroscopy. Ammonia absorbtion spectra in the 10 μm region were recorded with a resolution approaching the Doppler limit.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00886014
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  • 100
    Digitale Medien
    Digitale Medien
    Wide-range line-tunable oscillation of an optically pumped NH3 laser (1980)
    Springer
    Applied physics 21 (1980), S. 237-240 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 42.55 ; 42.60 ; 34.50
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract Selective single-line oscillation has been obtained from an NH3 laser in the range from 11 to 13 μm. Pumping of high pressure NH3−He mixture with theR(30) line of a TEA-CO2 laser made it possible to tune on more than 30 lines with the aid of a grating. However, such line tunable oscillation was not observed when theR(16) line was used for pumping. Reasons for this difference are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00886173
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