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Optical Engineering

Fiber specklegram sensing by means of an adaptive joint transform correlator
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Paper Abstract

An adaptive joint transform correlator is used to process the speckle fields derived from a multimode optical fiber. The system is applied to evaluate changes in the speckle field when the fiber is used as a sensor element. We experimentally demonstrate that the sensitivity for temperature measurement and for submicrometer displacement measurement can be as high as 0.1°C and 0.2 μm, respectively. The duty cycle of the proposed fiber sensing system is about 2.5 s, which is limited by the microcomputer that we have used. To extend the dynamic range of sensing measurement, an updated algorithm can be used, by which the dynamic range of sensing capability can be further extended.

Paper Details

Date Published: 1 November 1993
PDF: 6 pages
Opt. Eng. 32(11) doi: 10.1117/12.147713
Published in: Optical Engineering Volume 32, Issue 11
Show Author Affiliations
Francis T. S. Yu, The Pennsylvania State Univ. (United States)
Kun Pan
Chii-Maw Uang, The Pennsylvania State Univ. (United States)
Paul B. Ruffin, U.S. Army Missile Command (United States)

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