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Bulk and integrated acousto-optic spectrometers for radio astronomyThe development of sensitive heterodyne receivers (front end) in the centimeter and millimeter range, and the construction of sensitive RF spectrometers (back end) enable the spectral lines of interstellar molecules to be detected and identified. A technique was developed which combines acoustic bending of a collimated coherent light beam by a Bragg cell followed by detection by a sensitive array of photodetectors (thus forming an RF acousto-optic spectrometer (AOS). An AOS has wide bandwidth, large number of channels, and high resolution, and is compact, lightweight, and energy efficient. The thrust of receiver development is towards high frequency heterodyne systems, particularly in the millimeter, submillimeter, far infrared, and 10 micron spectral ranges.
Document ID
19820008029
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chin, G. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Buhl, D. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Florez, J. M. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 10, 2013
Publication Date
December 1, 1981
Publication Information
Publication: NASA. Langley Research Center Opt. Inform. Process for Aerospace Appl.
Subject Category
Optics
Accession Number
82N15902
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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