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  • 1
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    Stable 1.25 watts CW far infrared laser radiation at the 119 micron methanol line (1987)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Far-infrared CW radiation of 1.25 watts has been obtained at the 119 micron methanol line with a CO2 pump power of 125 watts, and the maximum frequency fluctuation of the free running laser is measured to be less than + or - 100 kHz per hour. Reflecting optics have been used, when possible, to minimize CO2 degradation, and the frequency stability is ensured by cooling the input and output couplers. The input and output assemblies within the lasing medium are enclosed to minimize the external effects on the cavity length and to eliminate the mechanical instabilities associated with the use of bellows. The vibrational bottle-neck is broken by cooling the resonator wall to 5 deg and adding He as the buffer gas.
    Keywords: LASERS AND MASERS
    Type: International Journal of Infrared and Millimeter Waves (ISSN 0195-9271); 8; 441-447
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    Method and means for generation of tunable laser sidebands in the far-infrared region (1987)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A method for generating tunable far-infrared radiation is described. The apparatus includes a Schottky-barrier diode which has one side coupled through a conductor to a waveguide that carries a tunable microwave frequency; the diode has an opposite side which is coupled through a radiating whisker to a bias source. Infrared light is directed at the diode, and infrared light with tunable sidebands is radiated by the whisker through an open space to a reflector. The original infrared is separated from a tunable infrared sideband by a polarizing Michelson interferometer.
    Keywords: LASERS AND MASERS
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    A stable, high power optically pumped far infrared laser system (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The generation of 1.25 watts of CW laser power at the 119-micron (2522.8 GHz) methanol line is reported. The maximum frequency fluctuation of the free running laser is less than + or - 100 kHz per hour. This laser has also been tested on numerous other lines ranging from 403.7 GHz (HCOOH) to 5260 GHz (CH3OD) with improved power and stability.
    Keywords: LASERS AND MASERS
    Type: International Conference on Lasers and Applications; Dec 07, 1987 - Dec 11, 1987; Lake Tahoe, NV; United States
    Format: text
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    NASA TECHNICAL REPORTS
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