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Proceedings Paper

Time And Space Integrating Acousto-Optic Folded Spectrum Processing For SETI
Author(s): Kelvin Wagner; Demetri Psaltis
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Paper Abstract

Time and space integrating folded spectrum techniques utilizing acousto-optic devices (AOD) as 1-D input transducers are investigated for a potential application as wideband, high resolution, large processing gain spectrum analyzers in the search for extra-terrestrial intelligence (SETI) program. The space integrating Fourier transform performed by a lens channelizes the coarse spectral components diffracted from an AOD onto an array of time integrating narrowband fine resolution spectrum analyzers. The pulsing action of a laser diode samples the interferometrically detected output, aliasing the fine resolution components to baseband, as required for the subsequent CCD processing. The raster scan mechanism incorporated into the readout of the CCD detector array is used to unfold the 2D transform, reproducing the desired high resolution Fourier transform of the input signal.

Paper Details

Date Published: 4 January 1986
PDF: 14 pages
Proc. SPIE 0564, Real-Time Signal Processing VIII, (4 January 1986); doi: 10.1117/12.949724
Show Author Affiliations
Kelvin Wagner, California Institute of Technology (United States)
Demetri Psaltis, California Institute of Technology (United States)


Published in SPIE Proceedings Vol. 0564:
Real-Time Signal Processing VIII
Keith Bromley; William J. Miceli, Editor(s)

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