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Proceedings Paper

Ultra-long distance fiber Bragg grating sensor system based on self-heterodyne detection
Author(s): Jiangjiang Cai; Guoliang Xu; Xiaodong Zhao
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Paper Abstract

A long-distance fiber Bragg grating (FBG) sensor system based on the self-heterodyne detection technique is proposed and experimentally demonstrated. In this system, a wavelength tunable laser was employed to scan the reflection spectrum of the FBG, and the reflection sensing signal was separated from the Rayleigh backscattering effectively. The system can achieve 148 km measurement length without amplification and the signal-noise ratio (SNR) of the detected Bragg wavelength signal is up to 24 dB. Applying this system to remote temperature detection, the measurement accuracy is 1°C.

Paper Details

Date Published: 17 October 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 842143 (17 October 2012); doi: 10.1117/12.970252
Show Author Affiliations
Jiangjiang Cai, Nanjing Univ. (China)
Guoliang Xu, Nanjing Univ. (China)
Xiaodong Zhao, Nanjing Univ. (China)


Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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