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Optical Engineering

Heterodyne ladar system efficiency enhancement using single-mode optical fiber mixers
Author(s): Donald K. Jacob; Martin B. Mark; Bradley D. Duncan
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Paper Abstract

A theoretical performance analysis of a heterodyne ladar system incorporating a single-rnode fiber receiver has been perforrned. For our purposes, the perforrnance parameters of interest are the coupling and mixing efficiency of the ladar receiver, as they relate to the overall system carrier-to-noise ratio. For a receiver incorporating a single-mode fiber mixer, the received and local-oscillator fields are matched both spatially and temporally at the detector, yielding 100% mixing efficiency. We have therefore focused our efforts on determining an expression for the efficiency with which a diffuse return from a purely speckle target can be coupled into the receiving leg of a monostatic, untruncated cw ladar system. Through numerical analysis, the expected coupling efficiency for a ladar system with negligible truncation of the transmit beam has been determined to be 30.6%.

Paper Details

Date Published: 1 November 1995
PDF: 8 pages
Opt. Eng. 34(11) doi: 10.1117/12.213594
Published in: Optical Engineering Volume 34, Issue 11
Show Author Affiliations
Donald K. Jacob, Univ. of Dayton (United States)
Martin B. Mark, Air Force Wright Lab. (United States)
Bradley D. Duncan, Univ. of Dayton (United States)

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