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Coherent optical three-dimensional spectrum-correlation processing of wave signals based on space–time integration |
Applied Optics, Vol. 51, Issue 33, pp. 7900-7909 (2012)
http://dx.doi.org/10.1364/AO.51.007900
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Abstract
The architectures of classical analog coherent optical (ACO) spectrum analyzers and correlators are not designed to process the wave signal as a whole, i.e., simultaneously in three dimensions. In this paper, the theory of ACO three-dimensional direct spectrum-correlation processing of spatial–temporal optical replicas (copies) of wave signals is discussed. In the single-stage and two-stage ACO systems, the spatial power spectrum and spatial correlation function of the wave signal (envelope) are obtained on the basis of space–time integration. The geometry of the final compressed signal in the output plane of either optical system allows one to evaluate the angle of wave arrival. The wave signal to be processed can theoretically have any form (due to autocorrelation properties of the systems) and an unlimited duration (due to time integration of wave energy and possibility of electronic subtraction of the intermediate bias terms of the time integration).
© 2012 Optical Society of America
OCIS Codes
(070.1170) Fourier optics and signal processing : Analog optical signal processing
(070.4550) Fourier optics and signal processing : Correlators
(070.4790) Fourier optics and signal processing : Spectrum analysis
ToC Category:
Fourier Optics and Signal Processing
History
Original Manuscript: May 29, 2012
Revised Manuscript: October 10, 2012
Manuscript Accepted: October 11, 2012
Published: November 13, 2012
Citation
Vasily Ezhov, "Coherent optical three-dimensional spectrum-correlation processing of wave signals based on space–time integration," Appl. Opt. 51, 7900-7909 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-33-7900
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