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Proceedings Paper

Optimization design of Mach-Zehnder interferometer and its application in a fiber Bragg grating phase sensor demodulation
Author(s): Dejun Feng; Zhiguo Liu; Weigang Zhang; Guiyun Kai; Xiaoyi Dong
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Paper Abstract

A fiber Bragg grating phase sensor demodulation scheme is demonstrated in this paper. An unbalanced Mach-Zehnder interferometer is used as the wavelength shift detector. The sensing fiber Bragg grating is attached on a piezoelectric transducer, through which a vibration signal is applied on the grating. To improve the fringe visibility of the output spectra of the Mach-Zehnder interferometer, we investigate the characteristics with detail. We find that there is an optimum optical path difference between the two arms of the interferometer. We successfully design and produce two Mach- Zehnder interferometer whose OPD are about 2.54 mm and 2.12 mm, and the relevant visibility are 9.7 dB, 18 dB, respectively. The experimental results have some potential applications in some regions, such as strain, temperature, and vibration detection.

Paper Details

Date Published: 8 August 2001
PDF: 5 pages
Proc. SPIE 4513, Optoelectronic Information Systems and Processing, (8 August 2001); doi: 10.1117/12.435883
Show Author Affiliations
Dejun Feng, Nankai Univ. (China)
Zhiguo Liu, Nankai Univ. (China)
Weigang Zhang, Nankai Univ. (China)
Guiyun Kai, Nankai Univ. (China)
Xiaoyi Dong, Nankai Univ. (China)

Published in SPIE Proceedings Vol. 4513:
Optoelectronic Information Systems and Processing
Yuri N. Kulchin; Oleg B. Vitrik, Editor(s)

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