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Proceedings Paper

Optical signal processing of a distributed fiber-optic force sensor
Author(s): Zhigao Li; Jian Zhou; Yingjun Pan; Shanglian Huang
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Paper Abstract

For the distributed fiber optical force sensor based on the principle of modecoupling of polarization-maintaining fiber and that of optical path compensation in the interference of quasi-monochromatic light, it is very important to process the weak optical signal from the sensing fiber. The paper analyzes the characteristics of the optical signal and suggests a Mach- Zehnder interferometer which includes an acouto-optical modulator and a polarized beam splitter to realize the polarization heterodyne interference. The method elimilates the iiifluences of light source fluctuation and back ground and cuts down the loss of the signal processing, so that it improves S/N ratio. The experiments coinicde well with the analysis.

Paper Details

Date Published: 22 September 1993
PDF: 6 pages
Proc. SPIE 2101, Measurement Technology and Intelligent Instruments, (22 September 1993); doi: 10.1117/12.156344
Show Author Affiliations
Zhigao Li, Chongqing Univ. (China)
Jian Zhou, Chongqing Univ. (China)
Yingjun Pan, Chongqing Univ. (China)
Shanglian Huang, Chongqing Univ. (China)

Published in SPIE Proceedings Vol. 2101:
Measurement Technology and Intelligent Instruments

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