26 October 2017 Quasidistributed temperature sensor based on dense wavelength-division multiplexing optical fiber delay
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Abstract
We report on a fiber-optic delay-based quasidistributed temperature sensor with high precision. The device works by detecting the delay induced by the temperature instead of the spectrum. To analyze the working principle of this sensor, the thermal dependence of the fiber-optic delay was theoretically investigated and the delay-temperature coefficient was measured to be 42.2    ps / km ° C . In this sensor, quasidistributed measurement of temperature could be easily realized by dense wavelength-division multiplexing and wavelength addressing. We built and tested a prototype quasidistributed temperature sensor with eight testing points equally distributed along a 32.61-km-long fiber. The experimental results demonstrate an average error of < 0.1 ° C . These results prove that this quasidistributed temperature sensor is feasible and that it is a viable option for simple and economic temperature measurements.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Jun Su, Jun Su, Ning Yang, Ning Yang, Zhiqiang Fan, Zhiqiang Fan, Qi Qiu, Qi Qiu, } "Quasidistributed temperature sensor based on dense wavelength-division multiplexing optical fiber delay," Optical Engineering 56(10), 106112 (26 October 2017). https://doi.org/10.1117/1.OE.56.10.106112 . Submission: Received: 6 July 2017; Accepted: 3 October 2017
Received: 6 July 2017; Accepted: 3 October 2017; Published: 26 October 2017
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