Bulk and integrated acousto-optic spectrometers for radio astronomy

Details Bulk and integrated acousto-optic spectrometers for radio astronomy Bulk and integrated acousto-optic spectrometers for radio astronomy

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981iopa.nasa...85c&link_type=abstract

In NASA. Langley Research Center Opt. Inform. Process for Aerospace Appl. p 85-91 (SEE N82-15894 06-74)

Physics

Optics

Acousto-Optics, Astronomical Spectroscopy, Integrated Optics, Optical Heterodyning, Radio Astronomy, Bragg Cells, Coherent Light, Photometers, Power Spectra, Radio Filters, Spectrum Analysis

Scientific paper

The 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.

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