Raman amplifier-based long-distance remote, strain and temperature sensing system using an erbium-doped fiber and a fiber Bragg grating

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

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

We demonstrate a novel, Raman amplifier-based long-distance sensing system for simultaneous measurement of temperature and strain using a combined sensing probe of an erbium-doped fiber (EDF) and a fiber Bragg grating. 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. We obtain a remote sensing operation of simultaneous temperature and strain measurement 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
Pages (from-to)3515-3520
Number of pages6
JournalOptics Express
Volume12
Issue number15
DOIs
StatePublished - Jul 2004

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