Title :
Long-distance FBG sensor system using a linear-cavity fiber Raman laser scheme
Author :
Peng, Peng-Chun ; Tseng, Hong-Yih ; Chi, Sien
Author_Institution :
Inst. of Electro-Opt. Eng., Nat. Chiao-Tung Univ., Hsinchu, Taiwan
Abstract :
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.
Keywords :
Bragg gratings; Raman lasers; distributed amplifiers; fibre optic sensors; laser beams; laser cavity resonators; optical fibre amplifiers; remote sensing by laser beam; 25 km; 25-km remote sensing position; distributed Raman amplifier; fiber Bragg grating sensor; gain medium; inhomogeneous broadening; large-scale fiber sensor; linear-cavity fiber Raman laser; long distance FBG sensor system; long-distance sensor; multipoint sensing applications; multiwavelength operation; optical signal-to-noise ration; Bragg gratings; Distributed amplifiers; Fiber gratings; Fiber lasers; Operational amplifiers; Optical amplifiers; Optical fiber amplifiers; Optical fiber sensors; Sensor systems; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.823128
