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Proceedings Paper

Raman amplifier-based long-distance temperature/strain sensing system incorporating a combined sensing probe of an FBG and an EFG recyling residual Raman pump
Author(s): Ju Han Lee; You Min Chang; Young Geun Han; Haeyang Chung; Sang Hyuck Kim; Sang Bae Lee
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Paper Abstract

A novel, Raman amplifier-based long-distance sensing system using a combined sensing probe of an erbium-doped fiber (EDF) and a fiber Bragg grating is proposed for simultaneous measurement of temperature and strain. By recycling residual Raman pump power for generation of amplified spontaneous emission in the EDF after distributed Raman amplification in the transmission fiber, the overall system configuration was significantly simplified without requiring any additional broadband light source. A remote sensing operation of simultaneous temperature and strain measurement is obtained at a location of 50 km. High quality of sensing signals with a ~ 11 dB signal-to-noise ratio (SNR) is readily achieved even after the 50 km transmission with distributed Raman 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: 10.1117/12.624268
Show Author Affiliations
Ju Han Lee, Korea Institute of Science and Technology (South Korea)
Univ. of Tokyo (Japan)
You Min Chang, Korea Institute of Science and Technology (South Korea)
Young Geun Han, Korea Institute of Science and Technology (South Korea)
Haeyang Chung, Kyung Hee Univ. (South Korea)
Sang Hyuck Kim, Korea Institute of Science and Technology (South Korea)
Sang Bae Lee, Korea Institute of Science and Technology (South Korea)


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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