Raman amplifier-based long-distance temperature/strain sensing system incorporating a combined sensing probe of an FBG and an EFG recyling residual Raman pump

Ju Han Lee; You Min Chang; Young Geun Han; Haeyang Chung; Sang Hyuck Kim; Sang Bae Lee

doi:10.1117/12.624268

23 May 2005 Raman amplifier-based long-distance temperature/strain sensing system incorporating a combined sensing probe of an FBG and an EFG recyling residual Raman pump

Ju Han Lee, You Min Chang, Young Geun Han, Haeyang Chung, Sang Hyuck Kim, Sang Bae Lee

Author Affiliations +

Proceedings Volume 5855, 17th International Conference on Optical Fibre Sensors; (2005) https://doi.org/10.1117/12.624268
Event: 17th International Conference on Optical Fibre Sensors, 2005, Bruges, Belgium

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.

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Ju Han Lee, You Min Chang, Young Geun Han, Haeyang Chung, Sang Hyuck Kim, and Sang Bae Lee "Raman amplifier-based long-distance temperature/strain sensing system incorporating a combined sensing probe of an FBG and an EFG recyling residual Raman pump", Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); https://doi.org/10.1117/12.624268

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