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Long-distance FBG sensor system using a linear-cavity fiber Raman laser scheme

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3 Author(s)
Peng-Chun Peng ; Inst. of Electro-Opt. Eng., Nat. Chiao-Tung Univ., Hsinchu, Taiwan ; Hong-Yih Tseng ; Sien Chi

We propose a novel fiber Bragg grating (FBG) sensor system using a linear-cavity fiber laser scheme with a distributed Raman amplifier as a gain medium. The inhomogeneous broadening property of the distributed Raman amplifier is used for multiwavelength operation. The experiment shows that such a linear-cavity fiber Raman laser can provide a stable output with an optical signal-to-noise ratio over 50 dB even if the FBG is located at a 25-km remote sensing position. The feature of our proposed fiber laser can facilitate a long-distance or a large-scale fiber sensor system and can be easily extended for multipoint sensing applications.

Published in:

Photonics Technology Letters, IEEE  (Volume:16 ,  Issue: 2 )

Date of Publication:

Feb. 2004

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