Paper
24 August 1992 Multichannel acousto-optical spectrometer
Author Affiliations +
Abstract
Photonic Systems Incorporated is currently fabricating a Multichannel Acousto-Optical Spectrometer (MCAOS) for NASA Goddard Space Flight Center. This instrument will be used as a frequency channelized radiometer for radio astronomy spectroscopy. It will analyze the spectrum of four independent radio frequency (RF) channels simultaneously and has potential for eight to as many as sixteen channels. Each channel will resolve the RF spectrum to one megahertz within its 1000 megahertz band. Dynamic range exceeding 30 dB will be achieved by quantizing detector photo-charge to 12 bits and accumulating data for large periods of time. Long time integration requires an optical bench optimized for stability and the use of temperature stabilization. System drift due to speckle interference is minimized by using a novel polarization switching Bragg cell.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
James A. Carter III and Dennis R. Pape "Multichannel acousto-optical spectrometer", Proc. SPIE 1704, Advances in Optical Information Processing V, (24 August 1992); https://doi.org/10.1117/12.142658
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Cited by 3 scholarly publications.
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KEYWORDS
Sensors

Acoustics

Signal to noise ratio

Bragg cells

Semiconductor lasers

Digital signal processing

Lens design

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