Wideband multichannel acousto-optic spectrometer for millimeter and submillimeter wavelength radio astronomy

Dennis R. Pape; James A. Carter III; Tim A. Sunderlin

doi:10.1117/12.262616

27 December 1996 Wideband multichannel acousto-optic spectrometer for millimeter and submillimeter wavelength radio astronomy

Dennis R. Pape, James A. Carter III, Tim A. Sunderlin

Author Affiliations +

Proceedings Volume 2969, Second International Conference on Optical Information Processing; (1996) https://doi.org/10.1117/12.262616
Event: Second International Conference on Optical Information Processing, 1996, St. Petersburg, Russian Federation

Abstract

Radiometer spectrometers are used in millimeter-wave radio astronomy for the spectral measurement of molecular rotational transitions. The spectrum of interest spans 10's of GHz and the measurement time is large in order to obtain useful signal-to-noise ratio. The low power/channel and simplicity of acousto-optic technology has led to the current development of acousto-optic spectrometers (AOS) with 1 GHz bandwidth and 100 channels. Additional AOS bandwidth and channelization is needed to increase spectral coverage, reduce overall data acquisition time, and accommodate multibeam antennas. A multichannel acousto-optic spectrometer (MCAOS) for radio astronomy spectroscopy applications has been developed with 4 channels that can process signals form 4 separate sources simultaneously. The bandwidth of each channel is 1 GHz and the frequency resolution is 1 MHz, providing simultaneous processing over 4,000 1 MHz channels. The design and initial performance of this instrument is described. Design considerations for future wider bandwidth MCAOS's are also presented.

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Dennis R. Pape, James A. Carter III, and Tim A. Sunderlin "Wideband multichannel acousto-optic spectrometer for millimeter and submillimeter wavelength radio astronomy", Proc. SPIE 2969, Second International Conference on Optical Information Processing, (27 December 1996); https://doi.org/10.1117/12.262616

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