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1

Digitale Medien

An investigation of laser-induced fluorescence for measuring velocity distributions of neutral atoms using a CW dye laser (1984)

Berres, W. ; Rusbüldt, D. ; Hintz, E. ; [weitere]

Springer

Applied physics 35 (1984), S. 83-93

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ISSN: 1432-0649

Schlagwort(e): 32.80 ; 42.60 ; 6.30

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The velocity distribution of evaporated Zr atoms has been measured by means of laser-induced fluorescence using a cw dye laser by scanning the laser line across the Doppler-broadened absorption line profile of the atoms. It is shown that the experimental data can be explained on the basis of an excitation theory for a three-level system developed from basic principles. It was calculated that the probability for an atom to be in the excited state mainly depends on the radiation-power density of the laser and on the residence time of the atom in the exciting laser light. It was found that the laser frequency must be well stabilized in order to meet the assumptions in the excitation calculation. Otherwise deviations to the theoretical predictions appear in the experimental results due to the jitter of the dye laser.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00697427

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2

Digitale Medien

Independently controllable multiline emission from a TEA CO2 laser (1984)

Chongyi, Wan ; Jinwen, Zhou ; Fuß, W. ; [weitere]

Springer

Applied physics 35 (1984), S. 123-126

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ISSN: 1432-0649

Schlagwort(e): 42.50 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Spatial separation of wavelengths in a CO2-laser resonator helps to avoid competitions. We have achieved this by means of a nearly concentric resonator with a grating or prism in its center. Thus, we demonstrated independent multiline emission with a variety of output spectra. The temporal sequence of the lines was conveniently controlled by varying their losses.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00697699

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3

Digitale Medien

Picosecond pulses and applications (1982)

Diels, J. -C. ; Fontaine, J. J. ; McMichael, J. C. ; [weitere]

Springer

Applied physics 28 (1982), S. 172-179

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ISSN: 1432-0649

Schlagwort(e): 42.60 ; 07.65

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00697843

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4

Digitale Medien

Theory of synchronously pumped dye lasers (1983)

Yasa, Z. A.

Springer

Applied physics 30 (1983), S. 135-142

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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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5

Digitale Medien

Laser atomic photoionization spectral analysis of element traces (1983)

Bekov, G. I. ; Letokhov, V. S.

Springer

Applied physics 30 (1983), S. 161-176

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ISSN: 1432-0649

Schlagwort(e): 32 ; 42.50 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract A new method for determining trace amounts of elements in a substance has been developed. It is based on thermal evaporation and atomization of a substance in vacuum and detection of the released trace atoms by the laser stepwise photoionization technique. A rather effective way of detecting atoms is their multistep excitation to Rydberg states by the radiation of tunable dye lasers with their subsequent ionization by electric field pulses. The analytical laser spectrometer consisting of several tunable, pulsed dye lasers, a vacuum chamber with an atomizer and a recording system is described. The microimpurities of elements have been detected in pure materials: the contents of Na impurities in CdS crystals (2×10−6%) and Al impurities in germanium (2×10−7%). The detection limit of about 10−9% was determined. A technique for direct determination of the content of elements in natural water and human blood is described. A high sensitivity, universality and other merits of the method enable it to be used in determining traces of many important elements at a level of 10−8 to 10−11% almost in any matrix.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00688402

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6

Digitale Medien

Amplification and measurement of single 1.6–3.5 ps Pulses generated by a distributed feedback dye laser (1983)

Szabó, G. ; Bor, Zs. ; Müller, Alexander

Springer

Applied physics 31 (1983), S. 1-4

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ISSN: 1432-0649

Schlagwort(e): 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract We have shown that distributed feedback dye lasers are capable of generating single transform-limited pulses of 1.6–3.5 ps duration when pumped by a mode-locked Nd: YAG laser. A short-pulse amplifier has been constructed in which the level of amplified spontaneous emission could be kept below 10−3 by properly taking into account the polarization anisotropy of the gain and by precise timing of the pump pulses. A sensitive autocorrelator is described which allows to measure pulse duration in a single shot.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00693898

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7

Digitale Medien

A discussion of the problem of determining multiple lifetimes from picosecond absorption recovery data as encountered in two carbocyanine dyes (1983)

Sundström, V. ; Gillbro, T.

Springer

Applied physics 31 (1983), S. 235-247

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ISSN: 1432-0649

Schlagwort(e): 42.60 ; 42.65 ; 61.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Absorption recovery kinetics data on the picosecond time-scale of a high signalto-noise ratio can be obtained by using continuously operating synchronously modelocked dye lasers. We show that such data make it possible to determine multiple exponential decays with small differences in rate constants. We also show that an absolute prerequisite to accomplish this is that the measurements are performed at a number of different wavelengths, and that the decays are monitored in a time interval corresponding to several lifetimes. These considerations are demonstrated by measurements on two carbocyanine dyes, DQOCI and pinacyanol, respectively.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00690794

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8

Digitale Medien

A cw uv copper hollow cathode laser in the 260 nm region (1983)

Yang, M.

Springer

Applied physics 32 (1983), S. 127-135

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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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9

Digitale Medien

CW and pulsed FIR-CO2 hybrid laser with improved efficiency and amplitude stability at short FIR wavelengths (1984)

Šolajić, Z. ; Heppner, J.

Springer

Applied physics 33 (1984), S. 23-27

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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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10

Digitale Medien

Laser photoion projector (1984)

Chekalin, S. V. ; Letokhov, V. S. ; Likhachev, V. S. ; [weitere]

Springer

Applied physics 33 (1984), S. 57-61

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ISSN: 1432-0649

Schlagwort(e): 33 ; 42.60 ; 82.50

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract A laser photodesorption microscope has been applied to obtain 4×103-fold images of rhodamine crystals on a tip with a diameter of 66μm. Peculiarities of the formation of these images have been studied with different values of electric field strength on the tip and laser pulse intensities.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00690026

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11

Digitale Medien

Dye-laser frequency stabilization using optical resonators (1984)

Hough, J. ; Hils, D. ; Rayman, M. D. ; [weitere]

Springer

Applied physics 33 (1984), S. 179-185

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ISSN: 1432-0649

Schlagwort(e): 06 ; 07.60 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract We describe a study, performed using heterodyne techniques, of the frequency fluctuations of two completely independent ring dye lasers locked to independent reference cavities. Single laser linewidths of less than 750 Hz were achieved, the principal limitation being residual vibrations from the noisy laboratory environment. With future design and environmental improvements, ultranarrow linewidths are expected thus providing a useful tool for a great variety of high precision experiments.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00688526

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12

Digitale Medien

Detection of free NH2(X 2 B 1) radicals by CARS spectroscopy (1984)

Dreier, T. ; Wolfrum, J.

Springer

Applied physics 33 (1984), S. 213-218

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ISSN: 1432-0649

Schlagwort(e): 35 ; 82.40 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract CARS spectra of NH3 and the free NH2-radical in the NH stretch region at 3334 and 3220 cm−1 have been obtained, respectively. The NH2 radicals were generated by laser photolysis of 0.5 mbar NH3 at 193 nm with an ArF-exciplex laser and detected by time resolved CARS spectroscopy.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00697330

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13

Digitale Medien

Frequency measurement chain to 30 THz using FIR schottky diodes and a submillimeter backward wave oscillator (1984)

Weiss, C. O.

Springer

Applied physics 34 (1984), S. 63-67

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ISSN: 1432-0649

Schlagwort(e): 06 ; 07.60 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract An infrared frequency measurement chain is reported, the simplicity of which allows phase-coherent frequency measurements up to 30 THz. Frequency measurement is demonstrated on the 10P(28) line of the Lamb-dip stabilized13CO2-laser.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00697949

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14

Digitale Medien

Transient orientational grating technique for investigations of fast molecular relaxation processes (1984)

Kühlke, D.

Springer

Applied physics 34 (1984), S. 129-137

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ISSN: 1432-0649

Schlagwort(e): 33.50 ; 42.10 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract A theoretical description of a three-pulse transient grating technique is given where the pump pulses form orientational gratings. Including energy relaxation and angular reorientation the temporal behavior of the diffraction efficiency and energy transmission is discussed with respect to the dependence on the corresponding rate constants and the results are compared with experimental data for Rh6G and RhB. The polarization plane of the pulse diffracted by the grating is found to be rotated in dependence on its initial polarization.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00697505

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15

Digitale Medien

Small-signal gain of Free Electron Laser in a resonator Gaussian mode (1984)

Boscolo, I. ; Gallardo, J.

Springer

Applied physics 35 (1984), S. 163-166

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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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16

Digitale Medien

Simultaneous, spatially resolved monitoring of C2 and OH in a C2H2/O2 flame using a diode array detector (1982)

Aldén, M. ; Edner, H. ; Svanberg, S.

Springer

Applied physics 29 (1982), S. 93-97

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ISSN: 1432-0649

Schlagwort(e): 33 ; 42.60 ; 82.40

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Simultaneous, spatially resolved monitoring of C2 and OH in a flame is reported. Data could be captured in 10 ns employing two pulsed lasers and a diode array detector. Laser-production of C2 was also observed and a kinetic study of such molecules was performed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00692769

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17

Digitale Medien

Waveform of the amplitude modulated laser light by means of a mechanical chopper (1983)

Mendaš, I. ; Cvijin, P. Vujković

Springer

Applied physics 32 (1983), S. 119-122

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ISSN: 1432-0649

Schlagwort(e): 42.80 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The model which reproduces accurately and conveniently the waveform of the amplitude modulated cw laser light in the TEM00 mode by a mechanical chopper is developed. It is found that its predictions are in good agreement with the strict, completely accurate but rather lengthy and inconvenient treatment and with the experiment. The criterion for the efficient amplitude modulation of the laser light by a mechanical chopper is formulated.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00688816

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18

Digitale Medien

Prospects for vapor-phase dye lasers (1984)

Stoilov, Yu. Yu.

Springer

Applied physics 33 (1984), S. 63-74

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ISSN: 1432-0649

Schlagwort(e): 42.60 ; 78.30 ; 78.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract This review covers the field of vapor-phase dye lasers (VPDL) with special emphasis on prospects of gas lasers with optical pumping. Some peculiarities of the gaseous active medium and a possibility to control its density near the critical point are discussed. High specific laser energies (∼0.3J/cm−3), low thresholds, and high efficiencies (20–40%) made it possible to construct a powerful tunable VPDL.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00688348

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19

Digitale Medien

A laser optical method for the determination of tropospheric OH concentrations (1984)

Ortgies, G. ; Comes, F. J.

Springer

Applied physics 33 (1984), S. 103-113

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ISSN: 1432-0649

Schlagwort(e): 42.68 ; 42.80 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract A long-path absorption procedure for the determination of tropospheric OH concentrations is described in detail. Initial measurements using this method were carried out in Frankfurt a. M. By including in the evaluation the visible radiation of a frequencydoubled dye laser used in the measurements, it was possible to mathematically reduce the signal fluctuations caused by the scattering and density fluctuations of tropospheric air. The resulting detection limit was 3×106 OH per cm3. SO2 concentrations which had to be simultaneously determined in order to eliminate an interference effect, could be detected in the range of 1–40 ppb on the absorption path.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00688355

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20

Digitale Medien

Magnetic field effect measurements by time-selective absorption sampling (1983)

Treichel, R. ; Staerk, H. ; Weller, A.

Springer

Applied physics 31 (1983), S. 15-17

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ISSN: 1432-0649

Schlagwort(e): 35 ; 07.65 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract An absorption method which permits time-selective measurements at different wavelengths has been developed in order to explore magnetic field effects on photoinduced electron transfer reactions in linked and unlinked donor-acceptor systems.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00693901

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21

Digitale Medien

Bistable operation of a dual-wavelength synchronously mode-locked cw dye laser (1983)

Ruddock, I. S. ; Illingworth, R.

Springer

Applied physics 32 (1983), S. 7-8

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ISSN: 1432-0649

Schlagwort(e): 42.60 ; 42.80

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Bistable operation of a dual-wavelength synchronously mode-locked cw dye laser is reported. Wavelength switching is found to depend on the pump power and the dye laser cavity lengths.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00688767

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22

Digitale Medien

Transverse mode dynamics in a free-electron laser (1984)

Elleaume, P. ; Deacon, D. A. G.

Springer

Applied physics 33 (1984), S. 9-16

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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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23

Digitale Medien

Tritium isotope separation by CO2-laser irradiation at low temperatures (1984)

Takeuchi, K. ; Satooka, S. ; Makide, Y.

Springer

Applied physics 33 (1984), S. 83-90

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ISSN: 1432-0649

Schlagwort(e): 82.50 ; 82.40 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Tritium isotope separation by CO2-laser induced multiphoton dissociation of CTF3 is investigated. For the optimization of the performance of this working substance, trifluoromethane, the conditions to yield high-selectivity at high-operating pressure and low-critical fluence for complete dissociation are studied using our deconvolution procedure. The irradiation conditions are varied over the following ranges; wavenumber: 1052–1087 cm−1, gas temperature: 25°C to −78°C, CHF3 pressure: 5–205 Torr. The selectivities exceeding 104 are observed for 85–205 Torr CHF3 at −78°C by the irradiation at 1057 cm−1.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00688351

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24

Digitale Medien

Directional and wavelength sweep of distributed-feedback dye-laser pulses (1984)

Szatmári, S. ; Bor, Zs.

Springer

Applied physics 34 (1984), S. 29-31

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ISSN: 1432-0649

Schlagwort(e): 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Directional and wavelength sweep of a pulse train from a distributed-feedback dye laser is studied and found not to be a thermal effect, rather a gain-induced one. The directional sweep can be used for single-pulse selection.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00697461

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25

Digitale Medien

New lasers (1982)

White, J. C. ; Henderson, D. ; Slatkine, M. ; [weitere]

Springer

Applied physics 28 (1982), S. 124-130

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ISSN: 1432-0649

Schlagwort(e): 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00697837

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26

Digitale Medien

Further study of continuous-wave CO flame chemical laser of the CS2/O2/N2O type (1983)

Trtica, M. ; Babarogié, Z.

Springer

Applied physics 30 (1983), S. 29-33

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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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27

Digitale Medien

CW dye laser operation at 200 W pump power (1982)

Baving, H. J. ; Muuss, H. ; Skolaut, W.

Springer

Applied physics 29 (1982), S. 19-21

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ISSN: 1432-0649

Schlagwort(e): 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract A continuously operating jet stream dye laser was pumped by a multiwavelength-multimode argon-ion-laser with a pump power up to 200 W. Rhodamine 6G-chloride was dissolved in a water-polyvinylalcohol-ammonyx solution. The dye laser was prism-tunable between 560 and 650 nm with maximum output power at 600 nm. The maximum output power of the cw dye laser was 43 W without tuning element and 33 W with a prism placed inside the cavity. Operation of a jet stream dye laser with a pump power higher than 200 W and an efficiency of about 30% seems to be possible.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00694364

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Free electron laser (1982)

Gaupp, A. ; Kurizki, G. ; McIver, J. K. ; [weitere]

Springer

Applied physics 29 (1982), S. 157-158

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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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29

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New lasers and laser schemes (1982)

Behn, R. ; Dupertuis, M. A. ; Kjelberg, I. ; [weitere]

Springer

Applied physics 29 (1982), S. 143-148

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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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30

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Energy transfer in slab dye lasers (1984)

Rivano, V. ; Mazzinghi, P. ; Burlamacchi, P.

Springer

Applied physics 35 (1984), S. 71-75

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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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Simultaneous phase-lock of five CO2 lasers to a primary Cs frequency standard (1984)

Whitford, B. G.

Springer

Applied physics 35 (1984), S. 119-122

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ISSN: 1432-0649

Schlagwort(e): 42.72 ; 42.80 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The output of a CO2 laser, operating on theP I(18) transition of13C16O2 at 26941 GHz (11.128 μm) was phase-locked to a 5 MHz signal from a primary Cs frequency standard by means of a frequency chain having only CO2 lasers as infrared sources. Simultaneously, four other CO2 lasers in the chain were phase-locked to the 26941 GHz output. This provided CO2 laser frequencies at 26 450 305, 26 940 815, 28 694 625, 29 442 480, and 33 185 715 MHz having zero long-term-average frequency error relative to the Cs standard, and the ±10−13 (≃3 Hz) long-term absolute uncertainty of the standard.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00697698

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32

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Self-phase locking in lasers with homogeneously broadened emission lines (1984)

Brunner, W. ; Fischer, R. ; Paul, H.

Springer

Applied physics 33 (1984), S. 187-193

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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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33

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Picosecond gain dynamics of KrF (1984)

Szatmári, S. ; Schäfer, F. P.

Springer

Applied physics 33 (1984), S. 219-223

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ISSN: 1432-0649

Schlagwort(e): 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract We describe the generation of excimer-laser pulses of 〈10 ps pulse width and up to 40 mJ pulse energy at 248.5 nm and their use in the measurement of ps gain dynamics in a KrF amplifier. Small-signal gain of 〉2×104, saturation energy density of 2.0 mJ/cm2, and gain recovery time of 4 ns were measured. In contrast to XeCl* no short-gain rcovery time was found in KrF* and the stored inversion could be fully depleted bya single ps pulse.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00697331

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34

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Atomic nitrogen laser action in a hollow cathode discharge (1981)

Zu-hui, Zhu ; Fu-Cheng, Lin

Springer

Applied physics 26 (1981), S. 227-229

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ISSN: 1432-0649

Schlagwort(e): 42.60 ; 34.70

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Near-infrared laser action of nitrogen atoms was obtained in a hollow cathode discharge. Four laser lines at wavelengths of 1358.2, 939.3, 938.7, and 862.9 nm were observed in the cw mode. In addition, the laser line at 904.6 nm was observed in quasi-cw operation in the afterglow for the first time. It is supposed that resonant charge exchange between He+ and N2 followed by predissociation of N 2 + is an important way of populating the upper laser levels.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00692542

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35

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Theory of the synchronously pumped picosecond dye laser (1982)

Herrmann, J. ; Motschmann, U.

Springer

Applied physics 27 (1982), S. 27-37

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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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36

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F-center-laser. Superconductivity (1982)

Chi, C. C. ; Loy, M. M. T. ; Cronemeyer, D. C. ; [weitere]

Springer

Applied physics 28 (1982), S. 306-310

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ISSN: 1432-0649

Schlagwort(e): 68 ; 42.70 ; 42.60 ; 61.70 ; 61.50 ; 42.80 ; 29

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00697860

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37

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Generation, stabilization, and amplification of subpicosecond pulses (1982)

Rotman, S. R. ; Roxlo, C. ; Bebelaar, D. ; [weitere]

Springer

Applied physics 28 (1982), S. 319-326

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ISSN: 1432-0649

Schlagwort(e): 07.60 ; 07.65 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract A sync-pumped cw dye laser system has been used to produce subpicosecond pulses. Pulses as short as 0.7 ps, assuming a single-sided exponential pulse shape, were observed. A set of experiments was performed to investigate the origin and effects of noise in the sync-pumped system. A digital and an analog feedback loop have been designed to optimize the pulse width. The noise has been lowered by 10 dB for frequencies up to 10 kHz; long-term drift is also controlled by this method. A four-stage dye laser amplifier, pumped by a Nd:YAG laser which operates at a 10-Hz repetition rate, is synchronized electronically to the dye-laser picosecond pulses. A gain of 3×106 has been achieved.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00686361

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38

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Laser action of C, N, O, F, Cl, and Br in hollow cathode discharges (1982)

Xu-hui, Zhu ; Jian-bang, Liu ; Fu-cheng, Lin

Springer

Applied physics 29 (1982), S. 111-115

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ISSN: 1432-0649

Schlagwort(e): 42.60 ; 34.70

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract C, N, O, F, Cl, and Br red and infrared laser emission was investigated using hollow cathode discharges in gas mixtures of helium and molecules containing the corresponding atoms. A total of 33 laser lines with wavelengths from 0.7 to 2.0μm was observed. Three laser lines of atomic C, five laser lines of atomic N, two laser lines of atomic Cl and five laser lines of atomic Br were observed for the first time. Dissociation charge transfer and dissociative excitation transfer are suggested as being responsible for populating the upper laser levels.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00692772

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Thermochemical instability of transparent media induced by an absorbing inclusion (1983)

Golberg, S. M. ; Matyushin, G. A. ; Pilipetsky, N. F. ; [weitere]

Springer

Applied physics 31 (1983), S. 85-88

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ISSN: 1432-0649

Schlagwort(e): 82.50 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The initial stage of thermochemical instability induced by an absorbing inclusion within a transparent matrix, which irradiated by a laser beam, is studied. The instability results in a low threshold (formally non-threshold) optical breakdown of the matrix. It is brought about by the additional absorption of the laser light by the products of the chemical reactions in the matrix. The instability is characterized by a certain induction time when the rate of the chemical reactions is almost steady. When the induction is over, their rate rapidly increases. Theoretical estimate of the induction time are offered. The experimental study of the induction time dependence on the laser-beam intensity confirmed the theoretical estimation.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00702603

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40

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Laser isotope separation of tritium from deuterium: CO2-laser-induced multiphoton dissociation of C2TF5 in C2DF5 (1983)

Makide, Y. ; Kato, S. ; Tominaga, T. ; [weitere]

Springer

Applied physics 32 (1983), S. 33-34

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ISSN: 1432-0649

Schlagwort(e): 82.50 ; 82.40 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Isotope separation of tritium from deuterium in heavy water was attempted by CO2-laser-induced, highly-selective multiphoton dissociation of C2TF5 present in C2DF5. Single-step T/D separation factors exceeding 3000, 1000, and 500 were attained, respectively, for the first time with CO2 laser 10P(34) 931.0 cm−1 at 10, 20, and 30 Torr pentafluoroethane pressures at −78 °C (i.e., equivalent to 15, 30, and 45 Torr at room temperature).

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00688772

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41

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Theory of passively mode-locked cw dye lasers (1982)

Herrmann, J. ; Weidner, F.

Springer

Applied physics 27 (1982), S. 105-113

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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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42

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Laser plasmas (1982)

Seka, W. ; Goldman, L. M. ; Soures, J. M. ; [weitere]

Springer

Applied physics 28 (1982), S. 290-296

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ISSN: 1432-0649

Schlagwort(e): 50 ; 34 ; 32.50 ; 42.60 ; 61.80 ; 62 ; 42.65

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00697858

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43

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CO2-laser isotope separation of tritium with pentafluoroethane-T (C2TF5) (1982)

Makide, Y. ; Kato, S. ; Tominaga, T. ; [weitere]

Springer

Applied physics 28 (1982), S. 341-348

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ISSN: 1432-0649

Schlagwort(e): 82.50 ; 82.40 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Isotope separation of tritium by CO2 laser-induced multiphoton dissociation (MPD) of C2TF5 is reported for the first time. The MPD spectrum obtained for C2TF5 comprised a broad peak at about 940 cm−1 where C2HF5 was nearly transparent. The unimolecular dissociation of C2TF5 was induced with much lower laser fluence than that for CTF3, another working molecule we proposed for laser isotope separation of tritium. The mechanisms and kinetics of the dissociation of C2TF5 and C2HF5 were investigated under various experimental conditions: laser frequency, pulse energy, pulse duration, tritium concentration, sample pressure, buffer gas pressure and irradiation geometry. Single-step separation factors exceeding 500 were achieved with the most efficientP(20) line in 00o–10o0 transition at 944.2 cm−1.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00686364

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44

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Quantitative lidar at 532 nm for vertical extinction profiles and the effect of relative humidity (1984)

Salemink, H. W. M. ; Schotanus, P. ; Bergwerff, J. B.

Springer

Applied physics 34 (1984), S. 187-189

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ISSN: 1432-0649

Schlagwort(e): 42.68 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract An analysis of 532 nm lidar data is presented for the retrieval of vertical extinction profiles. The strong influence of the relative humidity on the extinction-to-backscatter ratio is parametrized for this purpose. A comparison is made between remotely sensed and locally measured extinction coefficients, using reference values in aircraft and at ground level.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00697633

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45

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A subpicosecond dye laser pumped by a xenon ion laser (1984)

Bergamasco, G. ; Cecchetti, W. ; Polloni, R.

Springer

Applied physics 34 (1984), S. 191-192

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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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46

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Conditions for the harmonic-like and efficient amplitude modulation of the cw gaussian laser beam by means of a mechanical chopper (1984)

Mendaš, I. ; Vujković Cvijin, P. ; Ignjatijević, D.

Springer

Applied physics 34 (1984), S. 1-4

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ISSN: 1432-0649

Schlagwort(e): 42.80 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The values of the chopping disc slot and mark space widths relative to the radius of the Gaussian beam are found, which achieve optimum harmonic-like and efficient amplitude modulation of the cw laser beam. The simple approximation for the waveform of the modulated laser power valid for these optimum or near optimum values of the chopping disc parameters is presented.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00697456

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47

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Development of an optical time scale (1982)

Chebotayev, V. P. ; Goldort, V. G. ; Klementyev, V. M. ; [weitere]

Springer

Applied physics 29 (1982), S. 63-65

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ISSN: 1432-0649

Schlagwort(e): 42.60 ; 42.80

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract A time standard based on the use of an optical oscillation period of a frequencystable He−Ne laser as a time scale is first described. We obtained highly frequency-stable oscillations in the SHF range that were locked to the oscillations of a He−Ne laser stabilized to an absorption resonance in methane at 3.39 μm. A direct comparison of frequency stabilities of a rubidium standard and He−Ne/CH4 laser has been made. The absolute measurement of the frequency of the He−Ne/CH4 laser we performed gave a new value of frequency.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00694370

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48

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Nonlinear laser spectroscopy (1982)

Atkins, C. G. ; Hancock, G. ; Zacharias, H. ; [weitere]

Springer

Applied physics 29 (1982), S. 160-169

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ISSN: 1432-0649

Schlagwort(e): 32 ; 35 ; 42.65 ; 32 ; 33 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00688659

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49

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Picosecond pulses and applications (1982)

Bareika, B. ; Danielius, R. ; Dikchius, G. ; [weitere]

Springer

Applied physics 29 (1982), S. 176-179

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ISSN: 1432-0649

Schlagwort(e): 42.65 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00688661

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50

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Short uv laser pulse generation by quenching of resonator transients (1983)

Schäfer, F. P. ; Wenchong, Lee ; Szatmári, S.

Springer

Applied physics 32 (1983), S. 123-125

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ISSN: 1432-0649

Schlagwort(e): 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Short (〈0.5 ns) ultraviolet laser pulse generation by quenching of resonator transients is described. An output energy of 100–150 nJ at λ=340 nm is obtained using a pump energy of only 5–7 mJ at 308 nm. This pulse was amplified up to 100 μJ by a two stage amplifier.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00688817

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51

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On the high-voltage regime of the discharge in hollow-cathode tube (1984)

Mizeraczyk, J. ; Neiger, M.

Springer

Applied physics 33 (1984), S. 17-21

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ISSN: 1432-0649

Schlagwort(e): 52.00 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract A comparison of the operating characteristics of the high-voltage regime of the discharge in a hollow-cathode tube, the hollow-canthode discharge (HCD) and the discharge to a plane cathode are presented. The disappearnce of the hollow-cathode effect and the transition to a high-voltage discharge after inserting several anode rods into the cathode cylinder is exhibited. The similarity between the operating characteristics of such a high-voltage discharge and of a plane cathode discharge is shown. The loss of ions at the anode rods, as well at insulators or floating conductors is believed to be the reason behind the increase of the operating voltage and the disappearance of HCD characteristics. Practical means of increasing the operating voltage are mentioned.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00690021

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52

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Mirror problems of a cw argon-ion laser at high output power (1984)

Baving, H. J. ; Muuss, H. ; Skolaut, W.

Springer

Applied physics 33 (1984), S. 75-77

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ISSN: 1432-0649

Schlagwort(e): 42.30 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract We report upon some experiments done on a continuous-wave argon-ion laser which offers 300 W output power in the visible and 34 W in the ultraviolet region of the spectrum, limited by the degradation of the resonator mirrors. To avoid destruction of the outcoupling mirror, a folded three-mirror instead of a two-mirror cavity was tried, resulting in nearly the same output power.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00688349

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53

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Excimer-laser-pumped ps-dye laser (1984)

Szatmári, S. ; Schäfer, F. P.

Springer

Applied physics 33 (1984), S. 95-98

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ISSN: 1432-0649

Schlagwort(e): 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Generation of single dye laser pulses of 12 ps pulse width (FWHM) and 1.2 mJ pulse energy is described using only one XeCl-excimer laser as pump source. At 1 Hz pulse repetition rate the stability of amplitude and pulse width of these pulses is excellent.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00688353

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Effect of resonant laser light upon a fast-atom charge-exchange source (1984)

Rothe, E. W. ; Mathur, B. P. ; Reck, G. P.

Springer

Applied physics 35 (1984), S. 233-236

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ISSN: 1432-0649

Schlagwort(e): 42.60 ; 07.77 ; 34.50

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The effect of resonant laser-light upon a charge-exchange source of eV-range sodium atoms is to decrease the Na kinetic energy by about 2 eV. The mechanism probably involves a reduction of the space charge in the low-energy ion precursors. The reduction is caused by electrons created in collisional ionization of laser-excited atoms. This is related to the well-known optogalvanic effect. A knowledge of the existence of this effect can be important for the design of experiments involving laser driven chemistry.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00693932

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55

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Shape and delay of CO2-laser pulses in fog (1981)

El-Raey, M. ; Roshdy, N.

Springer

Applied physics 26 (1981), S. 251-253

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ISSN: 1432-0649

Schlagwort(e): 42.10 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The problem of propagation of 10.6 μm-CO2 laser pulses in fog has been formulated and solved numerically, making use of Duhammel's principle. Fog droplets are considered Mie scatterers in the Rayleigh limit. Evaporation, power loss and time delay of pulse peak have been studied. Possible extensions of the technique have been discussed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00692547

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56

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Laser plasmas (1982)

Hamadani, S. M. ; Soltanmoradi, F. ; Marvasti, M. H. ; [weitere]

Springer

Applied physics 29 (1982), S. 186-188

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ISSN: 1432-0649

Schlagwort(e): 42.60 ; 52

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00688664

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57

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The bi-directional amplifier in the constant intensity approximation and its application to KrF lasers (1983)

Shaw, M. J.

Springer

Applied physics 30 (1983), S. 5-10

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ISSN: 1432-0649

Schlagwort(e): 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Bi-directional and folded laser amplifiers are analysed in the constant intensity approximation. Simple analytical expressions are developed for gain, output intensity and extraction efficiency. The analysis is applied to electron-beam pumped KrF lasers and expressions for saturation intensity, small-signal gain coefficient and intrinsic efficiency in terms of gas composition and pump power per unit volume are given. The problem of fluorine burn-up in KrF lasers is discussed. Under certain conditions the analysis is shown to be equally applicable to oscillators and comparison is made with previous experimental results and computer code predictions.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00692651

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58

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Picosecond spectroscopy of intermolecular interactions in dye solutions (1983)

Rubinov, A. N. ; Bushuk, B. A. ; Murav'ov, A. A. ; [weitere]

Springer

Applied physics 30 (1983), S. 99-104

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ISSN: 1432-0649

Schlagwort(e): 42.60 ; 07.65

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Some new experimental data on the time development of ultrashort superfluorescence (SF) in the dye solution are presented. The correlation between temporal behaviour change and the change of the spectral and spatial intensity distribution gives direct evidence of the important role of the selffocusing phenomenon in the formation of the ultrashort SF pulse synchronized with the pumping one. The oriental relaxation of solvent molecules in the dye solution not only influences the duration of the dye SF via the selffocusing mechanism but also causes a temporal change of spontaneous emission spectrum. At least two different relaxation times were found in the fluorescence spectrum of the dye in several polar solutions.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00688484

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59

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High-order harmonic mixing with Schottky diodes in the FIR region (1984)

Weiss, C. O. ; Godone, A.

Springer

Applied physics 35 (1984), S. 199-200

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ISSN: 1432-0649

Schlagwort(e): 42.60 ; 07.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract We report results of harmonic mixing experiments between millimetric oscillators and FIR laser radiations up to 3 THz, using micrometer-size Schottky-barrier diodes. Signal-to-noise ratios suitable for precise frequency counting have been obtained for harmonic numbers up to 40.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00693927

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60

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A new blue-green XeF (C→A) excimer laser amplifier concept (1984)

Nachshon, Y. ; Tittel, F. K.

Springer

Applied physics 35 (1984), S. 227-231

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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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61

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Application of LiF crystals with F 2 − colour centers (1983)

Chebotayev, V. P. ; Marennikov, S. I. ; Smirnov, V. A.

Springer

Applied physics 31 (1983), S. 193-199

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ISSN: 1432-0649

Schlagwort(e): 42.60 ; 42.65

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract It is shown that LiF crystals with F 2 − colour centers may be used in lasers for cavity Q-switching and in high-power Nd: glass laser systems for, increasing the contrast and the self-excitation threshold. Also Lif crystals with F 2 − centers are successfully used for the generation of ultrashort pulses, for the generation of difference frequencies in the ir spectral range and in intracavity spectroscopy experiments.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00688843

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62

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Proposal for the measuring molecular velocity vector with single-pulse coherent Raman spectroscopy (1983)

She, C. Y.

Springer

Applied physics 32 (1983), S. 49-52

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ISSN: 1432-0649

Schlagwort(e): 42.60 ; 42.65

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Methods for simultaneous measurements of more than one flow velocity component using coherent Raman spectroscopy are proposed. It is demonstrated that using a kilowatt broad-band probe pulse (3–30 GHz) along with a megawatt narrow-band pump pulse (∼100 MHz), coherent Raman signal resulting from a single laser pulse is sufficient to produce a high-resolution Raman spectrum for a velocity measurement.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00688776

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63

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Generation of coherent ultraviolet radiation in the 330 nm region by multiphoton excitation of sodium vapor (1984)

Chen, J. K. ; Wu, C. Y. R. ; Kim, C. C. ; [weitere]

Springer

Applied physics 33 (1984), S. 155-160

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ISSN: 1432-0649

Schlagwort(e): 42.60 ; 42.65

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract We report the observation of coherent uv emission at 330.2±0.5 nm when sodium vapor in a heatpipe is irradiated with a pulsed visible dye laser with output wavelength in the 570–595 nm region. It is found that intense uv emission can be produced from Na atoms as well as from Na2 molecules. The excitation functions and their dependence on vapor density and laser power density are presented and the mechanisms for producing the emission are discussed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00688522

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64

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Waveguide CW 118.6 μm H2O laser (1982)

Belland, P.

Springer

Applied physics 27 (1982), S. 123-128

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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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65

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Extension of frequency measurements with Schottky diodes to the 4 THz range (1982)

Weiss, C. O. ; Godone, A.

Springer

Applied physics 27 (1982), S. 167-168

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ISSN: 1432-0649

Schlagwort(e): 42.60 ; 07.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The 11th harmonic mixing signals between a 386 GHz oscillator and a 4.25 THz laser with a signal to noise ratio of 25 dB in 100 kHz bandwidth have been obtained with a Schottky diode.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00697434

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66

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UV-laser induced photo-oxidation of aqueous benzene solutions: Formation of phenol (1982)

Irion, M. P. ; Fuß, W. ; Kompa, K. -L.

Springer

Applied physics 27 (1982), S. 191-194

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ISSN: 1432-0649

Schlagwort(e): 35 ; 36 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Aqueous solutions of benzene were irradiated by focussed KrF laser light. The formation of phenol together with varying amounts of 1.3-cyclopentadiene-1-carboxaldehyde was shown by uv absorption measurements. A mechanism for this photo-oxidation via benzene radical cations produced by 2-photon ionization of benzene is proposed. Comparative gas phase laser experiments and experiments with unfocussed laser beams were consistent with previous results using incoherent light sources.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00697440

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67

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UV laser photochemistry of acetylene at 193 nm (1982)

Irion, M. P. ; Kompa, K. L.

Springer

Applied physics 27 (1982), S. 183-186

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ISSN: 1432-0649

Schlagwort(e): 35 ; 36 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract ArF laser photolysis of acetylene at 193 nm yields diacetylene, ethylene and hydrogen (besides a polymer). No benzene or vinylacetylene is formed. Photolysis with deuterium gives no deuterated compounds. These observations are taken as evidence for a pure excited-molecule mechanism based upon C2H 2 * (1 A u).

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00697438

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68

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Optical klystron experiments for the ACO storage ring Free Electron Laser (1984)

Deacon, D. A. G. ; Billardon, M. ; Elleaume, P. ; [weitere]

Springer

Applied physics 34 (1984), S. 207-219

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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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69

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CVL-pumped dye laser for spectroscopic application (1984)

Broyer, M. ; Chevaleyre, J. ; Delacrétaz, G. ; [weitere]

Springer

Applied physics 35 (1984), S. 31-36

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ISSN: 1432-0649

Schlagwort(e): 42.60 ; 33 ; 36

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract A spectroscopic dye laser system-pumped by a Copper Vapor Laser (CVL)-has been built and optimized for different dye solutions operating in the spectral range from 530 to 890 nm. Conversion efficiencies up to 40% were reached in broad band operation, 24% with a prism expander grating cavity, and 20% in grazing incidence configuration, which operated at typical band widths of 3 GHz. Second harmonic generation (SHG) of the dye laser output produced tunable uv-radiation between 260 and 408 nm at conversion efficiencies ≦5%. Fundamental and SHG output were used for resonant ionization experiments in molecular beams.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00697518

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70

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Picosecond light-pulses tunable from the violet to the near infrared (1983)

Wondrazek, F. ; Seilmeier, A. ; Kaiser, W.

Springer

Applied physics 32 (1983), S. 39-42

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ISSN: 1432-0649

Schlagwort(e): 42.60 ; 42.65.C

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract System parameters of an optical parametric generator pumped by the third harmonic of a Nd:glass laser are presented. The tuning range extends from 5700 to 22,700 cm−1; i.e., it covers a frequency range of 17,000 cm−1. Experimental data on spectral bandwidths, conversion efficiencies, and pulse shape are discussed. A pump beam with a divergence of four degrees simultaneously generates the entire visible spectrum (blue to red) separated by the angle of emission.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00688774

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71

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Monitoring of the stratospheric ozone layer by laser radar (1983)

Werner, J. ; Rothe, K. W. ; Walther, H.

Springer

Applied physics 32 (1983), S. 113-118

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ISSN: 1432-0649

Schlagwort(e): 42.60 ; 92.60T ; 92.65

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Monitoring of the height distribution of atmospheric ozone up to 50 km is being performed with a ground-based lidar system, which has been in operation since October 1982 on the summit of Zugspitze in the German Alps. Daily and monthly averages of the ozone profile are being obtained with high precision. Furthermore, stratospheric aerosol layers, originating from the eruption of El Chichon volcano in Mexico in sping 1982 are being recorded.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00688815

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72

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New lasers, VUV sources (1982)

Srinivasan, T. ; Egger, H. ; Boyer, K. ; [weitere]

Springer

Applied physics 28 (1982), S. 198-207

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ISSN: 1432-0649

Schlagwort(e): 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00697846

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73

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Full-automatic broad-band wavelength control of a pulsed dye laser (1981)

Suzuki, T. ; Kato, H. ; Taira, Y. ; [weitere]

Springer

Applied physics 24 (1981), S. 331-340

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ISSN: 1432-0630

Schlagwort(e): 06.60 ; 42.60 ; 42.80

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract A full-automatic wavelength controled pulsed dye laser has been developed. With the control system, dye laser oscillations of nanosecond pulses are tuned to any wavelength in the visible or scanned in any sweep mode keeping the nearly transform-limited bandwidth of 0.45 GHz. A mechanical tuning of the wavelength is employed, such that the motion of three wavelength selectors is synchronized to give a smooth and precise wavelength control. The basic principle underlying the tuning scheme, various requirements to be met in system construction, and the practical performance of automatic wavelength control are described in this paper.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00899731

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74

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Tunable infrared generation using the 6s−5d Raman transition in caesium vapour (1980)

Wyatt, R. ; Cotter, D.

Springer

Applied physics 21 (1980), S. 199-204

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ISSN: 1432-0630

Schlagwort(e): 42.60 ; 42.65

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract Coherent infrared radiation tunable between 1.6 and 3.2 μm was generated with a pulsed dye laser by 6s−5d 5/2 stimulated electronic Raman scattering in caesium vapour. We describe a technique using thermal dissociation to reduce the density of caesium dimers in a heat-pipe oven, which produced a factor of 7 reduction in Raman threshold. The threshold displayed a marked dependence on pump bandwidth.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00886169

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75

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Wide-range line-tunable oscillation of an optically pumped NH3 laser (1980)

Tashiro, H. ; Suzuki, K. ; Toyoda, K. ; [weitere]

Springer

Applied physics 21 (1980), S. 237-240

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ISSN: 1432-0630

Schlagwort(e): 42.55 ; 42.60 ; 34.50

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract Selective single-line oscillation has been obtained from an NH3 laser in the range from 11 to 13 μm. Pumping of high pressure NH3−He mixture with theR(30) line of a TEA-CO2 laser made it possible to tune on more than 30 lines with the aid of a grating. However, such line tunable oscillation was not observed when theR(16) line was used for pumping. Reasons for this difference are discussed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00886173

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76

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Simplification of the helical TE N2 laser (1980)

Krahn, K. -H.

Springer

Applied physics 21 (1980), S. 319-321

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ISSN: 1432-0630

Schlagwort(e): 42.55 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract We report the observation that the helical TE N2 laser can effectively be simplified by giving up the use of decoupling elements as well as by abolishing the segmentation of the electrode structure. Although, as a consequence of this simplification, the operating pressure range was slightly decreased, the output power could be improved by roughly 30%, a result which is attributed to the new electrode geometry exhibiting lower inductance and lower damping losses.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00895921

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77

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Transient behaviour of pulsed dye lasers (1980)

Wyatt, R.

Springer

Applied physics 21 (1980), S. 353-359

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ISSN: 1432-0630

Schlagwort(e): 42.10 ; 42.60 ; 42.80

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract Some aspects of the transient behaviour of pulsed dye lasers are investigated both theoretically and experimentally. Relaxation oscillations induced in the output from a dye cell by an external reflector have been observed and explained, using a rate equation approximation to the physical situation in the dye cell. These oscillations are shown to play an important part in the generation of short laser pulses from long cavity dye lasers. Finally, it is proposed that 10 ps pulses can be obtained from conventional dye lasers pumped by 100 ps pulses from a high-pressure nitrogen laser.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00895927

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78

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Periodic pulse solutions of a laser consisting of a pair of amplifiers mode locked by a fast saturable absorber (1980)

Reddy, K. P. J.

Springer

Applied physics 22 (1980), S. 213-218

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ISSN: 1432-0630

Schlagwort(e): 42.55 ; 42.60 ; 42.65

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract We present periodic solutions, which are described in terms of Jacobian elliptic functions, for the steady state pulses from a laser system consisting of a pair of amplifiers of unequal relaxation time mode locked by a “fast” saturable absorber. The pulsewidth and the average power in the pulse are expressed interms of the system parameters through two different approaches, where detailed plots are given for one of the approaches. Summary of the characters to be possessed by the amplifier pair to ensure the reliable production of shortest possible pulses is given.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00886009

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79

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A monochromatic and frequency stabilized cw source in the 5 μm region obtained by doubling the frequencies of a cw laser in tellurium (1981)

Delahaigue, A. ; Thiebeaux, C. ; Jouve, P.

Springer

Applied physics 24 (1981), S. 21-22

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ISSN: 1432-0630

Schlagwort(e): 42.60 ; 42.65

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract In this paper we describe the construction of a monochromatic and frequency stabilized continuous wave (cw) source in the 5 μm region. It is built up by a cw single line, single-mode frequency and amplitude stabilized CO2 laser. This primary CO2 laser source is then frequency-doubled in a tellurium crystal using second harmonic generation (SHG). The obtained emission is monochromatic (half-width 50 kHz). The frequency can be varied discreetly from 4.6 μm to 5.5 μ depending on the CO2 laser line chosen.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00900391

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80

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Coherent interaction of picosecond frequency-tunable light pulses with excitons in a semiconductor (1981)

Dneprovskii, V. S. ; Chumash, V. N. ; Zimenko, E. V.

Springer

Applied physics 25 (1981), S. 157-160

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ISSN: 1432-0630

Schlagwort(e): 42.10 ; 42.60 ; 78.20

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract An investigation was made of the self-induced transparency effect in the semiconductor's exciton region using ultrashort frequency-tunable light pulses and an ultrafast streak camera.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00901289

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81

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On the possibility of using lasers as detectors of gravitational waves (1981)

Bagayev, S. N. ; Chebotayev, V. P. ; Dychkov, A. S. ; [weitere]

Springer

Applied physics 25 (1981), S. 161-164

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ISSN: 1432-0630

Schlagwort(e): 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract The possibility to use narrow optical resonances and highly stable lasers as detectors of gravitational waves are discussed. The methods for measuring small displacements are based on the registration of small variations of a radiation frequency that arise in changing an optical phase. First results on the use of narrow resonances for precision measurements of small displacements are given. The achieved absolute sensitivity of the measurements amounted to 6·10−6 Å on the basis of 5·102 cm.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00901290

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82

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High precision wavelength meter with Fabry-Perot optics (1981)

Konishi, N. ; Suzuki, T. ; Taira, Y. ; [weitere]

Springer

Applied physics 25 (1981), S. 311-316

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ISSN: 1432-0630

Schlagwort(e): 07.40 ; 07.60 ; 42.60 ; 42.80

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract A high precision wavelength meter in the visible is described, which is based on a Fabry-Perot interferometer with several etalons of different resolution. The interference fringe pattern projected on a photo-diode array detector is computationally processed to give a stepwise refinement of the wavelength value to any adjusted accuracy. The present model intends to provide digital and real-time values of high precision wavelength for dye-laser spectroscopy, and to serve as a monitor or as a pilot for wavelength control of a dye-laser source of nanosecond pulses. The model is, therefore, designed with particular emphasis on its short-pulse capability and on-line mode of operation as well as on its high sensitivity and resolution. Some arrangements of essential necessity are involved therein, such as to avoid an errorneous wavelength readout for a noisy incidence of pulsed field. The ultimate accuracy of wavelength measurement is prescribed by the resolving power of the thickest etalon employed. As applied to the pulsed source, the model determines the wavelength to the accuracy of ±one part in 107 for even a single shot nanosecond incidence of a fraction of μJ energy. The design and performance are described in connection to pulsed dye-laser incidence.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00902989

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83

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Incorporation of oxygen atoms into As+ implanted silicon during cw CO2 laser annealing in O2 (1983)

Boyd, Ian W.

Springer

Applied physics 31 (1983), S. 71-74

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ISSN: 1432-0630

Schlagwort(e): 42.60 ; 61.80 ; 78.50

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract By annealing Si layers amorphised by ion-implantation with a cw CO2 laser beam in oxygen rich environments, it has been possible to incorporate O atoms into the recrystallized lattice. Absorption measurements on such regrown layers by infrared spectrometry have shown that the impurities are preferentially bonded into substitutional lattice sites, rather than existing interstitially. Supplementary RHEED studies have indicated thatβ-cristobalite, a crystalline form of SiO2, has been formed. These investigations highlight the importance of the ambient during cw laser annealing.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00616307

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84

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Stabilization method of an infrared two-wavelength laser (1981)

Matsumoto, H.

Springer

Applied physics 24 (1981), S. 65-66

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ISSN: 1432-0630

Schlagwort(e): 42.72.+h ; 42.55.Fn ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract A simple method for stabilizing a He-Xe laser, which simultaneously operates at two wavelengths of 3.51 μm and 3.37 μm, is described. This stabilization method depends on the comparison of the light intensities of the two wavelengths, and has a possibility of realizing a stability of better than 1×10−8 with unmodulated output.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00900400

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85

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Excimers and excimer lasers (1980)

Hutchinson, M. H. R.

Springer

Applied physics 21 (1980), S. 95-114

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ISSN: 1432-0630

Schlagwort(e): 42.55 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract The development of excimers and excimer lasers are reviewed. The excimers of the noble gases (Xe 2 * , Kr 2 * , Ar 2 * ) and of the noble gas halides (e.g. KrF, XeCl) which, respectively, radiate in the vacuum ultra-violet and ultra-violet regions of the spectrum are described in terms of their structure, spectroscopy and formation kinetics and the methods of pumping, operational characteristics and applications of the lasers are discussed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00900671

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86

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Coherence time measurement of picosecond pulses by a light-induced grating method (1980)

Eichler, H. J. ; Klein, U. ; Langhans, D.

Springer

Applied physics 21 (1980), S. 215-219

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ISSN: 1432-0630

Schlagwort(e): 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract The temporal coherence function |Γ(τ)| of picosecond pulses from a Nd: YAG laser has been measured by diffraction at a transient grating. The coherence timet c =7 ps is small compared to the pulse widtht p =22 ps but is in correspondence with the spectral bandwidth Δv=12·1010 Hz. The new method for measuring the coherence function |Γ(τ)| is discussed and compared with a previous experiment.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00886171

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87

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Solvent effects on the gain of rhodamine 6G (1980)

Govindaunny, T. ; Sivaram, B. M.

Springer

Applied physics 23 (1980), S. 253-258

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ISSN: 1432-0630

Schlagwort(e): 42.60 ; 78.30 ; 78.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract The effect of solvents on the gain and the peaks of gain spectra is investigated for rhodamine 6G (R6G) under nitrogen laser pumping. The non-specific solute-solvent interaction for R6G is found to be mainly dispersive. Additional shifts produced for R6G in certain solvents are explained as due to hydrogen bonding. The gain characteristics are interpreted on the basis of the position and overlap of absorption and fluorescence spectra, the quantum yield, the absorption at the pumping wavelength and the refractive index of the solvent. For the solvents studied it is found that R6G has high gain in solvents with low refractive index and high polarity. Amongst the solvents studied the alcohols displayed the highest gain with methanol being the most suitable solvent. The lowest gain amongst the alcohols was with capryllic alcohol which gave a gain that was 69% of that obtained with methanol. Amongst all the solvents studied the lowest gain was with chloroform, being only 34% of the gain in methanol.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00914908

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88

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An anomalous Zeeman effect in methane at 3.39 μm (1981)

Bagayev, S. N. ; Belyayev, M. V. ; Dmitriyev, A. K. ; [weitere]

Springer

Applied physics 24 (1981), S. 261-265

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ISSN: 1432-0630

Schlagwort(e): 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract The present paper reports on the first observation of an anomalous Zeeman effect on the hyperfine components of theF 2 (2) line in methane (λ=3.39 μm), on an asymmetry of a nonlinear resonance in the magnetic field due to the influence of recoid, and on measurements of shifts of individual hyperfine components in weak magnetic fields.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00899767

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89

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The lanthanideβ″ aluminas (1983)

Farrington, G. C. ; Dunn, B. ; Thomas, J. O.

Springer

Applied physics 32 (1983), S. 159-161

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ISSN: 1432-0630

Schlagwort(e): 66.30 ; 61.70 ; 42.60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract The entire sodium ion content of sodiumβ″ alumina (Na1.67Mg0.67Al10.33O17) can be replaced with a variety of lanthanide ions by simple diffusion reactions at moderate temperatures (500–700°C). Lanthanideβ″ alumina crystals are hard, clear, chemically stable, and have well-defined crystal structures. The fluorescence spectrum of Nd3+ inβ″ alumina is similar to that in YAG. The lifetime of the4 F 3/2 state of Nd3+ in completely-exchangedβ″ alumina (350μs at 1021 Nd3+ cm−3) is about 45% longer than in YAG (240μs at 1020Nd3+ cm−3). The lanthanideβ″ aluminas may be of considerable interest as new phosphor and laser host materials.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00616612

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90

Digitale Medien

Vanadium oxidation as a result of cw CO2 laser irradiation in atmospheric air (1984)

Ursu, I. ; Nanu, L. ; Dinescu, M. ; [weitere]

Springer

Applied physics 35 (1984), S. 103-108

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ISSN: 1432-0630

Schlagwort(e): 42.60 ; 68.55 ; 61.80

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract New results are reported concerning the vanadium oxidation by cw CO2 laser irradiation in air at atmospheric pressure. Particular emphasis is paid both to the initial stage and the development of the oxidation process under the action of the laser radiation. Some aspects are finally discussed concerning the quantitative theoretical interpretation of the experimentally recorded data.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00620638

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