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  • 1
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    Acousto-optic spectrometer for radio astronomy (1980)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: A prototype acousto-optic spectrometer which uses a discrete bulk acoustic wave Itek Bragg cell, 5 mW Helium Neon laser, and a 1024 element Reticon charge coupled photodiode array is described. The analog signals from the photodiode array are digitized, added, and stored in a very high speed custom built multiplexer board which allows synchronous detection of weak signals to be performed. The experiment is controlled and the data are displayed and stored with an LSI-2 microcomputer system with dual floppy discs. The performance of the prototype acousto-optic spectrometer obtained from initial tests is reported.
    Keywords: LASERS AND MASERS
    Type: NASA. Langley Res. Center Heterodyne Systems and Technol., Pt. 2; p 385-397
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Discovery of natural gain amplification in the 10 muon m CO2 laser bands on Mars: The first definite natural laser (1980)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Fully resolved intensity profiles of various lines in the CO2 bands at 9.4 micrometers and 10.4 micrometers were measured on Mars using an infrared heterodyne spectrometer. Analysis of the line shapes shows that the Mars atmosphere exhibits positive gain on these lines, providing the first definite detection of natural optical gain amplification and enabling identification of these lines as the first definite natural laser ever discovered.
    Keywords: LASERS AND MASERS
    Type: NASA-TM-82048
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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