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Proceedings Paper

Fiber laser sensor based on fiber-Bragg-grating Fabry-Perot cavity
Author(s): Jianfeng Chen; Yunqi Liu; Tongjian Cai; Tingyun Wang
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Paper Abstract

We propose a fiber-Bragg-grating Fabry-Perot (FBG-FP) cavity sensor interrogated by a pulsed laser. The FBG-FP cavity is directly written into the same photosensitive fiber, which consists of a pair of FBGs with identical center wavelength. The modulated laser pulses are launched into the FBG-FP cavity. Each pulse produces a group of reflection and transmission pulses. The cavity loss in the FBG-FP cavity is determined from the power ratio of the first two pulses reflected from the cavity, which could be detected for the sensor measurement. This technique has the advantages that it does not require high reflectivity FBG and is immune to the power fluctuation of the light source.

Paper Details

Date Published: 19 January 2011
PDF: 6 pages
Proc. SPIE 7986, Passive Components and Fiber-Based Devices VII, 798615 (19 January 2011); doi: 10.1117/12.888651
Show Author Affiliations
Jianfeng Chen, Shanghai Univ. (China)
Yunqi Liu, Shanghai Univ. (China)
Tongjian Cai, Shanghai Univ. (China)
Tingyun Wang, Shanghai Univ. (China)

Published in SPIE Proceedings Vol. 7986:
Passive Components and Fiber-Based Devices VII
Perry P. Shum, Editor(s)

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