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Proceedings Paper

Coherent Differential Demodulation (CDD) For Time-Integrating Optical Correlators
Author(s): Ted David
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Paper Abstract

Coherent time-integrating optical correlators retain phase information. Due to slowly shifting laser phase and mechanical vibration, long-term phase reliability is not easily achieved. Coherent differential phase-shift keying can overcome these problems. An implementation of coherent differential demodulation suitable for use with optical correlators is described. The stochastic nature of the output of the CDD processor is investigated. Experimental results are summarized, and compared with a simulation of the CDD processor to validate the theoretical processor model.

Paper Details

Date Published: 24 September 1986
PDF: 9 pages
Proc. SPIE 0639, Optical Information Processing II, (24 September 1986); doi: 10.1117/12.964346
Show Author Affiliations
Ted David, Litton Amecom (United States)


Published in SPIE Proceedings Vol. 0639:
Optical Information Processing II
Dennis R. Pape, Editor(s)

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