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Proceedings Paper

Long-distance fiber Bragg grating sensor system based on hybrid Raman/erbium-doped fiber amplification
Author(s): Zeng-Lin Ran; Yun-Jiang Rao; Ning Nie; Rong-Rui Chen
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Paper Abstract

In this paper, a hybrid Raman and Erbium-doped fiber amplifier (Raman/EDFA) is first proposed for enhancement of the performance of long-distance fiber Bragg grating (FBG) sensor systems. The Raman fiber amplifier is used for achieving low-noise amplification of FBG signals while the EDFA arranged remotely is used for both the compensation of the fiber loss due to long-distance transmission and the illumination of remotely-located FBG sensors as a broadband source by using the residual Raman pump power to generate ASE light and by amplifying the transmission light of the FBGs located before the EDFA. Such a sensor system adopts the advantages of the low noise feature of the distributed Raman amplifier and the high small-signal gain of the EDFA. Experimental results show that the performance of the sensor system has been improved significantly. A signal-to-noise ratio (SNR) of ~13dB has been achieved for a 50 km transmission distance, which is ~10dB than that without amplification.

Paper Details

Date Published: 23 May 2005
PDF: 4 pages
Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); doi: 10.1117/12.624276
Show Author Affiliations
Zeng-Lin Ran, Univ. of Electronic Science and Technology of China (China)
Yun-Jiang Rao, Univ. of Electronic Science and Technology of China (China)
Chongqing Univ. (China)
Ning Nie, Chongqing Univ. (China)
Rong-Rui Chen, Chongqing Univ. (China)

Published in SPIE Proceedings Vol. 5855:
17th International Conference on Optical Fibre Sensors
Marc Voet; Reinhardt Willsch; Wolfgang Ecke; Julian Jones; Brian Culshaw, Editor(s)

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