15 October 2013 High-sensitivity temperature sensor based on highly-birefringent microfiber
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Proceedings Volume 8924, Fourth Asia Pacific Optical Sensors Conference; 89240C (2013) https://doi.org/10.1117/12.2034171
Event: Asia Pacific Optical Sensors Conference 2013, 2013, Wuhan, China
We demonstrate an ultrasensitive temperature sensor by sealing a highly-birefringent microfiber into an alcoholinfiltrated copper capillary. With a Sagnac loop configuration, the interferometric spectrum is strongly dependent on the external refractive index (RI) with sensitivity of 36800nm/RIU around RI=1.356. As mainly derived from the ultrahigh RI sensitivity, the temperature response can reach as high as −14.72 nm/°C in the range of 30.9-36.9 °C. The measured response time is ~8s, as determined by the heat-conducting characteristic of the device and the diameter of the copper capillary. Our sensor is featured with low cost, easy fabrication and robustness.
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Li-Peng Sun, Li-Peng Sun, Jie Li, Jie Li, Long Jin, Long Jin, Shuai Gao, Shuai Gao, Zhuang Tian, Zhuang Tian, Yang Ran, Yang Ran, Bai-Ou Guan, Bai-Ou Guan, "High-sensitivity temperature sensor based on highly-birefringent microfiber ", Proc. SPIE 8924, Fourth Asia Pacific Optical Sensors Conference, 89240C (15 October 2013); doi: 10.1117/12.2034171; https://doi.org/10.1117/12.2034171

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