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  • 1990-1994  (25)
  • 1985-1989  (16)
  • 1
    Electronic Resource
    Electronic Resource
    Molecular Changes at Speciation (1991)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Ecology, Evolution, and Systematics 22 (1991), S. 281-308 
    Details
    ISSN: 0066-4162
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.es.22.110191.001433
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  • 2
    Electronic Resource
    Electronic Resource
    Novel magnetic-spiker sustainer excitation circuit for a multijoule TE CO2 laser (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 2175-2179 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Successful operation of a multijoule output TE CO2 laser using a new magnetic-spiker sustainer excitation circuit is reported. The use of the new excitation circuit has resulted in a significant reduction (∼90%) in the amount of sustainer pulse energy that has to pass through the magnetic switch. In addition, the new circuit technique allows operation of the discharge at reduced voltage (∼50%) and extends the range of excitation current pulse durations (up to ∼7 μs) over which arc-free discharges can be formed. The laser has produced a typical output of 5 J at an overall efficiency of ∼13% from a helium-free gas mixture at a pressure of 400 mbar.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144722
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  • 3
    Electronic Resource
    Electronic Resource
    Efficient long pulse TE-CO2 laser using magnetic-spiker sustainer excitation (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 5543-5545 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Long pulse operation of a multijoule transverse-electric-CO2 laser using a magnetic-spiker sustainer excitation in conjunction with a pulse forming network is described. The laser has produced 4.5 J in a 5 μs long pulse at a high efficiency of ∼10% from an active discharge volume of 416 cm3. The overall system is simple and reliable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1143378
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  • 4
    Electronic Resource
    Electronic Resource
    Efficient helium-free multi-joule TE-CO2 laser using spiker-sustainer excitation (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 71-74 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A highly efficient multi-joule output TE-CO2 laser has been developed using a spiker-sustainer excitation method. With helium-free laser gas mixtures 5-J laser pulses have been produced at a pressure of 400 mbar with an energy output efficiency of 22.6%. The addition of small amounts of hydrogen to the gas mix has been found to enhance laser performance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1142645
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  • 5
    Electronic Resource
    Electronic Resource
    Efficient switchless multi-Joule TE-CO2 laser (1991)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 62 (1991), S. 1404-1407 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Switchless mode operation of a pulse TE-CO2 laser is reported. The system has provided an output energy of 7 J at atmospheric pressure from a discharge volume of 3 cm×3.3 cm×42 cm with an efficiency of 8%. Under long pulse loading, it has provided 3.5 J in a 5 μs pulse at an efficiency of 7% at a pressure of 500 mbar. The elimination of the high voltage switch from the main discharge circuit has resulted in a simple and inexpensive laser system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1142457
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  • 6
    Electronic Resource
    Electronic Resource
    Novel discharge circuit for a multijoule TEA CO2 laser (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 563-566 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A novel discharge circuit that reduces significantly the amount of energy conducted by the switch in a TEA CO2 laser is reported. We demonstrate this circuit on a working multijoule TEA CO2 laser in which the switch is shown to conduct typically only 5% of the total input pulse energy. The laser has worked reliably in gas mixtures that place stringent demands on the discharge and circuit. It has produced an output of 7 J at an efficiency of 9.6% using a CO2:N2:He (1:1:4) gas mixture at atmospheric pressure and further using a helium-free gas mixture (CO2:N2:H2 at 400 mbar) it has produced a maximum efficiency of 14.6% for an output of 7.8 J. The great simplicity and high efficiency of the new discharge circuit allow it to be incorporated in the existing laser designs with minimal modifications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1145118
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  • 7
    Electronic Resource
    Electronic Resource
    Compact high repetition rate magnetically switched transverse, electric, atmospheric CO2 laser (1990)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 61 (1990), S. 1821-1824 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A corona preionized compact transverse, electric, atmospheric CO2 laser providing an average optical output of 18 W from a 4.6-cm3 discharge volume is reported. The laser was driven at pulse rates up to 1 kHz by an all solid-state exciter circuit which has produced〉109 pulses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1141100
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  • 8
    Electronic Resource
    Electronic Resource
    Effect of second harmonic generation of idler wave on difference frequency generation (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 2405-2407 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effect of second harmonic generation of idler wave on the process of difference frequency generation is analyzed theoretically. It is shown that, in general, the presence of second harmonic generation has a favorable influence on the evolution of the difference frequency wave. When the two processes are exactly phase matched, the usual oscillations in the variation of generated wave intensity with the interaction length are almost completely eliminated while retaining nearly complete conversion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.337959
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  • 9
    Electronic Resource
    Electronic Resource
    Wavelength dependence of high-efficiency second-harmonic generation in CdGeAs2 (1985)
    Springer
    Applied physics 36 (1985), S. 17-20 
    Details
    ISSN: 1432-0649
    Keywords: 42.65 ; 42.70 ; 42.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The frequency-doubling performance of CdGeAs2 as a function of wavelength has been characterised using a representative selection of lines from the 9 and 10 μm bands of a single mode TEA CO2 laser. Results are shown to be in good agreement with theory in which wavelength dependent absorption, most significant for the generated signal, is taken into account.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00698031
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  • 10
    Electronic Resource
    Electronic Resource
    Self-focussing of CO2 laser radiation in SF6 (1992)
    Springer
    Applied physics 55 (1992), S. 501-502 
    Details
    ISSN: 1432-0649
    Keywords: 42.65.Jx
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Self-focussing of high-power TEA CO2 laser pulses for a number of 10 μm P-band lines is reported in SF6 molecular gas. Application of this effect to estimating the intensity-dependent refractive index of the gas is demonstrated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00332509
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