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Heterodyne spectroscopy of astronomical and laboratory sources at 8.5 microns using diode laser local oscillatorsThe first 8.5 microns infrared heterodyne spectrometer has been constructed using tuneable semiconductor (PbSe) diode lasers and was used to measure absorption line profiles of N2O in the laboratory, as well as black-body emission from the moon and from Mars. Spectral information was recorded over a 200 MHz bandwidth using an 8-channel filter bank. The resolution was 25 MHz (6 millionths of a micron), and the minimum detectable (black-body) power was approximately 1 times 10 to the minus 16th power W for 8 min of integration. The results demonstrate the usefulness of heterodyne spectroscopy for the study of remote and local sources in the infrared.
Document ID
19750053117
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Mumma, M.
Kostiuk, T. (NASA Goddard Space Flight Center Laboratory for Extraterrestrial Physics, Greenbelt, Md., United States)
Cohen, S. (NASA Goddard Space Flight Center Laser Technology Branch, Greenbelt, Md., United States)
Buehl, D. (National Radio Astronomy Observatory, Greenbank, W. Va.; NASA, Goddard Space Flight Center Laboratory for Extraterrestrial Physics, Greenbelt, Md., United States)
Von Thuna, P. C. (Arthur D. Little, Inc. Cambridge, Mass., United States)
Date Acquired
August 8, 2013
Publication Date
July 1, 1975
Subject Category
Astronomy
Accession Number
75A37189
Distribution Limits
Public
Copyright
Other

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