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  • Artikel  (605)
  • 42.55
  • Chromatographie, Dünnschicht
  • hypertension
  • Springer  (605)
  • Cambridge University Press
  • Frontiers Media
  • 2020-2022
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  • 1
    Digitale Medien
    Digitale Medien
    Regulation of sodium and body fluid homeostasis during development: Implications for the pathogenesis of hypertension (1992)
    Springer
    Cellular and molecular life sciences 48 (1992), S. 345-351 
    Details
    ISSN: 1420-9071
    Schlagwort(e): Renin-angiotensin ; development ; hypertension ; SHR
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract The spontaneously hypertensive rat (SHR) is an important animal model of human essential hypertension. During the first month of life, increased retention of sodium is present in the SHR which appears to be mediated by the renin-angiotensin system. The present review will discuss the role that increased activity of the renin-angiotensin system plays in sodium/body fluid regulation during early development. It is hypothesized that disordered regulation of sodium/body fluid homeostasis during this stage leads to pathological cardiovascular regulation in adulthood. Through an understanding of the relationship between sodium/body fluid balance in the young and cardiovascular function in the adult insights may be gained into both the pathological state of hypertension and the critical role played by early development in shaping homeostatic mechanisms in adulthood.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01923428
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  • 2
    Digitale Medien
    Digitale Medien
    Comparisons between the inorganic content of healthy and hypertensive rat tissues by inductively coupled plasma-mass spectrometry (1994)
    Springer
    BioMetals 7 (1994), S. 155-162 
    Details
    ISSN: 1572-8773
    Schlagwort(e): hypertension ; inductively coupled plasma-mass spectrometry ; inorganic content ; rat tissues
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract The inorganic contents of bone, brain, erythrocyte, heart, kidney cortex, kidney medulla, liver, lung, muscle and plasma from spontaneously hypertensive rats were compared with those of the same tissues from healthy Sprague-Dawley rats. A general inductively coupled plasma-mass spectrometry method developed for multi-element determinations of most of the elements present in biological tissues was used. Variations were found not only for major elements, as expected, but also for many trace elements in several tissues.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00140486
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  • 3
    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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  • 4
    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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  • 5
    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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  • 6
    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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  • 7
    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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  • 8
    Digitale Medien
    Digitale Medien
    Amplified spontaneous emission in short-pulse excimer amplifiers (1990)
    Springer
    Applied physics 51 (1990), S. 71-74 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.60 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We have found a simple analytical expression which describes the relation between amplified spontaneous emission (ASE) and small-signal gain in short-pulse amplifiers. It is also shown that the contrast of the short pulse to the ASE is weakly dependent on the saturation of the ASE, and influenced mainly by the saturation of the short pulse. The theoretical considerations were verified by measurements.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00332330
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  • 9
    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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  • 10
    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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  • 11
    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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  • 12
    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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  • 13
    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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  • 14
    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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  • 15
    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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  • 16
    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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  • 17
    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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  • 18
    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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  • 19
    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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  • 20
    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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  • 21
    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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  • 22
    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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  • 23
    Digitale Medien
    Digitale Medien
    611.8 nm single-mode He-Ne laser (1990)
    Springer
    Applied physics 51 (1990), S. 292-294 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The conditions for optimum 611.8 nm laser operation are obtained and a convenient method for indicating 3.39 µm suppression is proposed. Single longitudinal mode 611.8 nm generation is obtained using higher gas-mixture pressure and application of an axial magnetic field. Several milliwatt monomode output power and 0.75 multimode-to-monomode power conversion coefficients are obtained without an internal iodine cell. A comparison of the experimental results with a single-mode laser theory is given.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00325050
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  • 24
    Digitale Medien
    Digitale Medien
    Performance of internal-mirror frequency-stabilized He-Ne lasers emitting green, yellow or orange light (1990)
    Springer
    Applied physics 51 (1990), S. 421-426 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.50 ; 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A comprehensive control system has been developed for the stabilization of internalmirror He-Ne lasers to their power envelopes. It is designed particularly for use with lasers emitting at 552, 505, or 490 THz (543, 594, 612 nm). The aim has been to combine convenience in routine operation with good day-to-day resettability and minimal frequency drift during a day. The lasers are observed to emit in up to four modes simultaneously and their tuning behaviour is highly alignment-sensitive. They also tend to flip between modes having orthogonal linear planes of polarization. Reliable control of polarization and mode frequency are possible using permanent magnets and active length control through thermal expansion. The stabilized single-frequency outputs have frequency drifts of about 2×10−8 per year, and powers of between 150 μW and 850 μW.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00329105
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  • 25
    Digitale Medien
    Digitale Medien
    Output and picosecond amplification characteristics of an efficient and high-power discharge excimer laser (1991)
    Springer
    Applied physics 52 (1991), S. 1-7 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Improvements in output pulse energy and efficiency of a conventional capacitor-transfer-type discharge excimer laser with automatic preionization have been achieved by extending the discharge volume and resulting moderate pumping of the active medium. The discharge laser produces a pulse energy of more than 1 J for XeCl, KrF, and ArF lasers in square beams of about 2×2 cm2, and the maximum overall efficiency observed is 2.9% for XeCl, 3.2% for KrF and 1.8% for ArF. The laser device has been involved in a picosecond (∼ 32 ps) XeCl laser amplification system, and was operated as an amplifier at a repetitive frequency of 10 Hz. Saturation fluence for XeCl laser was measured to be 1.4 mJ/cm2, and the picosecond pulse energy of ∼40 mJ was extracted from the amplifier.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00405678
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  • 26
    Digitale Medien
    Digitale Medien
    Investigation of vibrational relaxation of excimers (1991)
    Springer
    Applied physics 52 (1991), S. 22-26 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The excimer vibtational relaxation have been studied in the diffusional approximation, and stationary substantially non-equilibrium populations of high vibrational levels have been found. New formulae have been derived for quantum yield of UV lasing. Taking into account the vibrational relaxation the new effect of far-IR radiation amplification in the active media of excimer lasers is predicted.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00405681
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  • 27
    Digitale Medien
    Digitale Medien
    New far infrared laser lines from 13CH2F2 and frequency measurements (1991)
    Springer
    Applied physics 52 (1991), S. 32-35 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We report new FIR laser lines from 13CH2F2 molecules optically pumped by a waveguide CO2 laser. The increased tunability (300 MHz) with respect to a conventional CO2 laser allows the pumping of 13CH2F2 vibrational transitions of large offset. 34 new laser lines have been discovered, ranging from 113.1 μm to 491.4 μm in wavelength, thus increasing the number of known FIR laser lines from this important molecule to 99. For all the new lines and many (36) of those known previously, precise offset measurements through the transferred Lamb-dip technique were performed. The frequency of six new laser lines was also directly measured by heterodyne detection with known laser lines.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00405683
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  • 28
    Digitale Medien
    Digitale Medien
    New FIR laser lines from CD3OD optically pumped by a CO2 waveguide laser (1991)
    Springer
    Applied physics 52 (1991), S. 36-41 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract In this work we report new FIR laser lines from CD3OD optically pumped by a CO2 waveguide laser. The wide tunability of this laser (290 MHz) makes it possible to pump absorption lines with large frequency offset relative to the CO2 laser line center, which are not possible by using conventional CO2 lasers. As a consequence 19 new laser lines have been discovered, ranging from 38.0 μm to 455.2 μm in wavelength. For all lines, precise frequency offset measurements between the CO2 line center and the center of the absorber CD3OD line were performed using the transferred Lamb-dip technique. We also present direct Doppler-free offset measurements of infrared absorption, obtained within the FIR laser cavity itself, using optoacoustic detection.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00405684
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  • 29
    Digitale Medien
    Digitale Medien
    Nonlinear mirror based on raman interactions (1991)
    Springer
    Applied physics 52 (1991), S. 96-101 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.65 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We analyze a nonlinear mirror based on Raman interactions. The mirror is a combination of a Raman-active medium and a tetrachroic mirror. The reflections of the nonlinear mirror at two input frequencies differing by the Raman shift are calculated and its properties and possible applications are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00357662
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  • 30
    Digitale Medien
    Digitale Medien
    Negative feedback using a nonlinear mirror for the generation of a long train of short light pulses (1991)
    Springer
    Applied physics 52 (1991), S. 158-162 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.65 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A nonlinear mirror is used to provide a passive negative feedback in an actively mode-locked pulsed Nd:YAG laser. Trains of 250 ps pulses with a total length of up to 50 microseconds were generated. The train duration is limited only by the flashlamp pump pulse length.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00750944
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  • 31
    Digitale Medien
    Digitale Medien
    Diagnostics of a Compact Discharge-Pumped XeCl Laser with BCl3 Halogen Donor (1991)
    Springer
    Applied physics 52 (1991), S. 234-243 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 52.65 ; 52.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The results of a comprehensive study of a compact UV-preionized XeCl laser are presented. The subjects of this study were: discharge voltage and current measurements, dye laser probing of the active medium, and the mass spectrometry of gas mixture degradation products. It is shown that the gas lifetime was significantly improved when the laser was operated with BCl3 as a halogen donor instead of commonly used HCl. By the dye laser absorption and gain probing, the temporal and spatial dependences of the densities for several plasma components, Ne*, Xe*, Xe+*, Cl−, XeCl* and of ground state boron atoms were measured. Some aspects of plasma kinetics for uniform and constricted phases of the discharge are discussed. By the mass spectrometry of gas mixture degradation products on long-term operation of the laser device several gaseous (N2, O2, CO2, H2O, C2H4) and solid (NiCl2, H3BO3) products were detected in the laser chamber. NH4Cl was determined to be a stable fraction of the deposits on optics surfaces. The reasons for the improvement of gas lifetime for BCl3-containing gas mixtures are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00750957
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  • 32
    Digitale Medien
    Digitale Medien
    Simultaneous oscillation on UV and IR transitions of the copper ion laser (1991)
    Springer
    Applied physics 52 (1991), S. 323-325 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 52.25
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Simultaneous oscillation of UV (248–270 nm) and IR lines (773–785 nm) in the copper ion laser with helical hollow cathode has been observed using high reflectivity combination mirrors. The output power characteristics of these laser lines are measured as functions of the discharge current and fill-gas pressure. A total laser power of about 100 mW with equal UV and IR contributions was obtained.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00325489
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  • 33
    Digitale Medien
    Digitale Medien
    Infrared recombination lasers pumped by low energy Nd: YAG and excimer lasers (1992)
    Springer
    Applied physics 54 (1992), S. 234-238 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60B ; 52.50J
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract 24 infrared laser lines on atomic and ionic transitions have been observed in recombining plasmas by vaporizing and ionizing Cd, Pb, Sn, Zn, and Mg with low energy Nd:YAG or excimer pump-lasers. For operation and optimization of the recombination lasers separated plasma spots and a plasma confinement have been used. The operation of shorter wavelength systems by isoelectronic scaling is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00325509
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  • 34
    Digitale Medien
    Digitale Medien
    Elimination of variables in simple laser equations (1992)
    Springer
    Applied physics 55 (1992), S. 117-120 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.65 ; 02
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The usual way of obtaining rate equations (RE) and a single equation for the field amplitude (EFA) from the semiclassical laser equations (Lorenz-Haken model) is reexamined by undertaking a systematic elimination procedure developed in synergetics. The RE and EFA are justified in the case 1 (γ⊥≫γ∥, κ) and case 2 (γ⊥, γ∥≫κ), respectively. We show that, because the eliminated variable happens to contain a considerable contribution from an unstable mode, the usual elimination technique in the case 3 (γ⊥, κγ∥) leads to an inconsistency. As important by-products we obtain the RE and EFA for arbitrary cavity relaxation constant (κ). Some remarks are given on the direct elimination technique in the non-diagonal representation in the study of instabilities.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00324060
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  • 35
    Digitale Medien
    Digitale Medien
    Polarization and power characteristics of pulsed dye lasers with transverse pumping (1992)
    Springer
    Applied physics 55 (1992), S. 494-500 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Starting from the classical theory on molecular luminescence in liquids, rate equation for two-polarization-mode laser oscillation under transverse pumping with intense excitation have been set forth neglecting the influence of orientational relaxation of the dye molecules. Hence, the laser output power and polarization under different configurations have been obtained. The results show that the dye laser is partially polarized even when the pump beam is unpolarized and no polarizing elements exist in the cavity. If we define a reference plane consisting of the axes of the pump beam and the dye laser, the laser system has to adopt the plane perpendicular to the reference plane as the polarization direction in order to yield a highly efficient, linearly polarized laser output. Experiments on a copper-vapor laser pumped dye laser verified these analytical results.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00332508
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  • 36
    Digitale Medien
    Digitale Medien
    Simultaneous detection of atomic and molecular hydrogen using a tunable ArF excimer laser (1993)
    Springer
    Applied physics 56 (1993), S. 229-234 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We report preliminary experiments which demonstrate the simultaneous detection of both atomic and molecular hydrogen using a single tunable ArF laser. The tunable ArF laser was modified to lase simultaneously at two wavelengths by the addition of a second grating to the oscillator stage as in earlier work by Ketterle et al. for KrF operation. To our knowledge, this is the first demonstration of dual-wavelength capability with a tunable ArF excimer. The H atom diagnostic utilized tunable ArF excimer laser output at 193.29 nm which was Raman shifted in D2 (first Stokes) to generate 205.14 nm radiation which then excited the H atom to its (3s, 3d) states via a two-photon transition. Fluorescence was detected at 656 nm on the (3s, 3d) → 2p transition. The second wavelength from the tunable excimer was used to excite several rovibronic LIF transitions of hydrogen molecule via two-photon absorption on the E 1Σ g + ⇐ X 1Σ g + (2,0) band. Fluorescence occurs at 750 nm and 830 nm on the (E 1Σ g + ⇒ B 1Σ g + ) transitions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00348630
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  • 37
    Digitale Medien
    Digitale Medien
    Nonlinear behaviour of atomic fluorescence in mercury vapours following double-resonance laser excitation (1994)
    Springer
    Applied physics 58 (1994), S. 303-307 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 32.00 ; 42.55 ; 42.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract When mercury atoms, present with a buffer gas (N2 or Ar) in a quartz cell or in a graphite furnace are excited into the 73 S 1 level by means of two pulsed dye lasers tuned at 253.652 nm (61 S o → 63 P 1) and 435.835 nm (63 P 1 → 73 S 1), a laser-like, collimated emission is observed along the axis of the cell at the green mercury line (73 S 1 → 63 P 2), 546.074 nm). This radiation exhibits a pronounced non-linear dependence upon the number density of the mercury atoms in the cell. This behaviour is interpreted as being due to amplified spontaneous emission (ASE), which occurs as a result of the transient population inversion between the 7s 3 S 1 and 6p 3 P 2 o levels. The parameters governing the population inversion can be deduced by applying a rate equation analysis to the atomic system. A time-resolved observation of both ASE and spontaneous fluorescence signals confirms the totally different characteristics of the two emission processes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01082625
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  • 38
    Digitale Medien
    Digitale Medien
    Orange, red and deep-red flashlamp-pumped Pr3+:LiYF4 laser with improved output energy and efficiency (1994)
    Springer
    Applied physics 58 (1994), S. 421-424 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.60.Lh ; 42.55 ; 42.70
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Three laser transitions (607.2 nm, 639.5 nm, 720.9 nm) in a flashlamp-pumped Pr3+:LiYF4 laser at room temperature are investigated. Cerium ions (Ce3+) doped into the fused-quartz envelope of the flashlamp efficiently transfer strong UV radiation from pumping light into the absorption region of Pr3+ ions (λ = 420−480 nm), so that the slope efficiency of all three laser emissions could be increased by almost 100% compared to excitation with a pure quartz flashlamp. At a pump energy of 30 J the output energy of these three laser emissions reached 4.7 mJ, 87 mJ and 30 mJ.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01081884
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  • 39
    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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  • 40
    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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  • 41
    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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  • 42
    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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  • 43
    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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  • 44
    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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  • 45
    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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  • 46
    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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  • 47
    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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  • 48
    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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  • 49
    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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  • 50
    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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  • 51
    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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  • 52
    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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  • 53
    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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  • 54
    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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  • 55
    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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  • 56
    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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  • 57
    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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  • 58
    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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  • 59
    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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  • 60
    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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  • 61
    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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  • 62
    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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  • 63
    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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  • 64
    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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  • 65
    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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  • 66
    Digitale Medien
    Digitale Medien
    Theory of active-passive mode-locking of solid-state lasers using a nonlinear mirror (1990)
    Springer
    Applied physics 50 (1990), S. 409-413 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.65 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The theory of active-passive mode-locked solid-state lasers is developed where the passive mode-locking is achieved by a nonlinear mirror. Steady-state cw numerical solutions are analyzed in detail for the case of a Nd: YAG laser. The steady-state pulse duration can be reduced by an order of magnitude as compared to the pure active mode-locking regime.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00325094
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  • 67
    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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  • 68
    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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  • 69
    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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  • 70
    Digitale Medien
    Digitale Medien
    Detection of atomic oxygen in flames by absorption spectroscopy (1994)
    Springer
    Applied physics 59 (1994), S. 543-546 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 32.20 ; 42.55 ; 82.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The absolute concentration of atomic oxygen in an atmospheric pressure hydrogen/air flame has been measured using Intracavity Laser Spectroscopy (ICLS) based on a dye laser pumped by an argon-ion laser. Absorptions at the highly forbidden transitions at 630.030 nm and 636.380 nm were observed at an equivalent optical length of up to 10 km. The relatively low intensity of the dye laser avoids photochemical interferences that are inherent to some other methods for detecting atomic oxygen. The detection sensitivity is about 6 × 1014 atom/cm3 and can be improved with better flame and laser stabilization.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01082398
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  • 71
    Digitale Medien
    Digitale Medien
    IR and FIR spectroscopy of 13CD3OH around the 10P(22) and 10P(24) CO2 laser lines: New FIR laser emissions, frequency measurements and assignments (1992)
    Springer
    Applied physics 54 (1992), S. 24-28 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract By using high resolution infrared Fourier transform data on 13CD3OH and the 10P(22) and 10P(24) lines of a waveguide CO2 laser to optically pump this methanol isotope, eight new FIR laser lines were observed. The frequencies of five laser lines were directly measured by heterodyne detection with already known laser lines. Particularly interesting are the lines pumped by the 10P(24) line, since a triade of emissions could be completely assigned.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00331730
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  • 72
    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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  • 73
    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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  • 74
    Digitale Medien
    Digitale Medien
    Optimum gain length for pulsed dye laser amplifiers (1990)
    Springer
    Applied physics 50 (1990), S. 133-136 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60d
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract It is shown analytically that for a pulsed dye laser amplifier, transversely pumped by a short duration pulsed laser, there exists an optimum gain length of the amplifier at dye laser wavelengths at which ground state absorption does not vanish. Thus, if the available pump power is distributed over this gain length, the extraction efficiency and the saturated gain of the amplifier reaches a maximum. The dependence of the extraction efficiency and gain on the amplifier length is strongly affected by the nonlinear absorption of the dye laser arising from excited state absorption, subsequent to ground state absorption.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00331908
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  • 75
    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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  • 76
    Digitale Medien
    Digitale Medien
    Laser induced lasing in CS2 vapor (1992)
    Springer
    Applied physics 54 (1992), S. 221-226 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.50 ; 42.55 ; 42.55H
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract When CS2, contained in a tube at pressures ranging from 350 to 450 mTorr, was optically excited by a pulsed laser at a wavelength of 343.6 nm to the J=29, v=(0, 10, 0), R 3 B 2 state (i.e., the Σ=0 component of the a 3 A 2 state), six coherent emissions were observed along the same axis from both ends of the tube. These emissions possess the characteristics of the pump laser, such as linewidth, pulse duration and polarization, but do not need a cavity to gain amplification. The emissions terminate on the high vibrational states of the ground electronic state. A time delay between the pump laser and the emissions was observed. The emission intensity depends non-linearly on the CS2 pressure and exhibits a third order power dependence. A cooperative stimulated emission model is proposed to explain this phenomenon.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00325506
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  • 77
    Digitale Medien
    Digitale Medien
    Output power enhancement of the 632.8 nm monomode He-Ne/I2-laser (1992)
    Springer
    Applied physics 54 (1992), S. 307-308 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract For the He-Ne/I2-laser, a stable monomode operation has been realized when the tube pressure exceeds a certain level. An output power of more than 1 mW has been obtained at the 632.8 nm laser transition. Within the monomode tuning range of the laser, the d, e, f, g, and h, i, j iodine hyperfine components of the R(127) line of the 11–5 band of the B 3 II + 0u−X 1Σ+ 0g electronic transition have been observed. The mode selection method used makes it possible to increase the contrast of the iodine hyperfine components.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00325197
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  • 78
    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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  • 79
    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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  • 80
    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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  • 81
    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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  • 82
    Digitale Medien
    Digitale Medien
    Double XeCl laser with lateral UV preionization (1990)
    Springer
    Applied physics 51 (1990), S. 254-257 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 42.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We present a very compact and very reliable laser system formed of two discharge sections both with lateral UV preionization. The discharge electrodes are contained in a single vessel and form an oscillator-amplifier system. A single spark gap switches on both circuits. By applying a generalized self-filtering unstable resonator to the oscillator and injecting the laser beam into the single pass amplifier, an output beam of 105 mJ, with a brightness of 5.5×1013 W cm−2Sr−1 has been obtained. Moreover, by applying a pulse-forming network in one discharging circuit, the duration of the discharge breakdown has been increased and output laser pulses of 40 ns FWHM, and 80 ns base width duration (at 10% points) and of energy 100 mJ are obtained.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00325044
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  • 83
    Digitale Medien
    Digitale Medien
    Carbon atom fluorescence and C2 emission detected in fuel-rich flames using a UV laser (1991)
    Springer
    Applied physics 52 (1991), S. 371-375 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 82.40
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Laser-induced fluorescence from carbon atoms, excited at the two-photon resonances around 280 nm, has been detected in fuel-rich hydrocarbon flames together with Swan band emission from the C2 radical, which was non-resonantly excited at the same wavelengths. The emission from the C atom and from the C2 molecule exhibited several similarities, indicating a possible common photo-chemical origin.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00325152
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  • 84
    Digitale Medien
    Digitale Medien
    Experimental studies of a XeCl laser having UV preionization perpendicular and parallel to the electrode surfaces (1991)
    Springer
    Applied physics 53 (1991), S. 14-18 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 46.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract This paper reports on the results of an experimental study of a XeCl laser having two independent preionizators which generated UV radiation into the active medium in the perpendicular and parallel directions to the electrode surfaces. Output energy and other parameters were measured using a single preionizator and two preionizators, changing the power supply polarity and varying the delay time between the preionization and the main discharge. When the preionization system generated photons only in the direction perpendicular to the electrode surfaces, a high discharge current and a high output laser energy were obtained. Besides, the diffusion coefficient of the photo-preionized electrons, played an important role in the laser behaviour, particularly when a consistent delay time between the onset time of the preionization and the main discharge was present.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00325476
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  • 85
    Digitale Medien
    Digitale Medien
    A tunable bragg cavity for an efficient millimeter FEL driven by electrostatic accelerators (1993)
    Springer
    Applied physics 57 (1993), S. 217-225 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.50 ; 42.55
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A comparison between three possible cavity configurations, the confocal cavity, the ring cavity and the Bragg cavity is presented for a millimeter FEL set within the high voltage head of an electrostatic accelerator. A simple mechnical design to make the Bragg cavity tunable is proposed. The usual theory of the sinusoidal Bragg corrugation, in cylindrical geometry, is extended to the rectangular corrugation and, further, the theory of the Bragg mirror is extended to rectangular geometry. The features of a Bragg mirror in cylindrical and rectangular geometry are compared.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00334538
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  • 86
    Digitale Medien
    Digitale Medien
    A diode-laser-pumped tunable Ho: YLF laser in the 2 µm region (1994)
    Springer
    Applied physics 58 (1994), S. 69-71 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.55 ; 78.45
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We report the cw laser emission of Ho: YLF in an astigmatically compensated resonator under pumping by a laser diode array. We measured the laser efficiency at different operating temperatures of the crystal and the non-saturated gain coefficient at the peak wavelength of laser emission. The laser tunability extends from 2.040 µm to 2.075 µm.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01081716
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  • 87
    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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  • 88
    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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  • 89
    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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  • 90
    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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  • 91
    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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  • 92
    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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  • 93
    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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  • 94
    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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  • 95
    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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  • 96
    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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  • 97
    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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  • 98
    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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  • 99
    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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  • 100
    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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