1 November 1993 Fiber specklegram sensing by means of an adaptive joint transform correlator
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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.
Francis T. S. Yu, Francis T. S. Yu, Kun Pan, Kun Pan, Chii-Maw Uang, Chii-Maw Uang, Paul B. Ruffin, Paul B. Ruffin, } "Fiber specklegram sensing by means of an adaptive joint transform correlator," Optical Engineering 32(11), (1 November 1993). https://doi.org/10.1117/12.147713 . Submission:
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