Distributed Temperture Sensing with Erbium-Doped Fiber Amplifiers

Paul Kai Yiu Ko, M. S. Demokan, Hwayaw Tam

Research output: Journal article publicationJournal articleAcademic researchpeer-review


The experimental verification of a novel fiber-optic sensor which performs distributed measurement of temperature by using a distributed erbium-doped fiber amplifier (EDFA) is presented. The sensor configuration is similar to that of a conventional optical time-domain reflectometer and detects the Rayleigh backscattered portion of a pulsed optical signal which is amplified by the EDFA, along with the backward amplified spontaneous emission (ASE) generated by the EDFA. The sensor utilizes the temperature dependence of the gain in an EDFA. The amplification provided by the erbium-doped fiber, which is pumped at 1.48 /spl mu/m, significantly increases the magnitude of the optical signal reaching the receiver, thus leading to a simplified configuration and a potentially superior performance as compared to other types of distributed fiber-optic temperature sensors.
Original languageEnglish
Pages (from-to)2236 - 2245
JournalJournal of Lightwave Technology
Issue number10
Publication statusPublished - Oct 1996


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