High-sensitivity temperature sensor based on highly-birefringent microfiber

Li-Peng Sun; Jie Li; Long Jin; Shuai Gao; Zhuang Tian; Yang Ran; Bai-Ou Guan

doi:10.1117/12.2034171

15 October 2013 High-sensitivity temperature sensor based on highly-birefringent microfiber

Li-Peng Sun, Jie Li, Long Jin, Shuai Gao, Zhuang Tian, Yang Ran, Bai-Ou Guan

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

Abstract

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.

Citation Download Citation

Li-Peng Sun, Jie Li, Long Jin, Shuai Gao, Zhuang Tian, Yang Ran, and 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); https://doi.org/10.1117/12.2034171

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