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14 February 2005 High-sensitivity coupling evanescent wave temperature sensor
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An optical fiber temperature sensor based on optical fiber coupler and evanescent wave is presented. The overall goal of our research is to design a temperature sensor system which is used to monitor temperature accurately. Coupler is used as the sensor probe. Such kind of coupler uses standard communication SM fiber to be a sensing component of evanescent wave. The probe is obtained by replacing the cladding of coupler region with temperature sensitive material. The whole system is then exposed in a thermal bath. A numerical modeling of the sensor based on supermode theory is studied and the result is simulated. At last, the system for temperature measurement in experiment is simply described.
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Huayu Bao, Tingyun Wang, and Yuqing Shen "High-sensitivity coupling evanescent wave temperature sensor", Proc. SPIE 5634, Advanced Sensor Systems and Applications II, (14 February 2005);

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