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

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

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

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.

Original languageEnglish
Article number208
Pages (from-to)848-851
Number of pages4
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5855 PART II
DOIs
StatePublished - 2005
Event17th International Conference on Optical Fibre Sensors, OFS-17 - Bruges, Belgium
Duration: 23 May 200527 May 2005

Keywords

  • Erbium-doped fiber
  • Fiber Bragg grating
  • Fiber-optic sensors
  • Raman amplification

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