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Proceedings Paper

High-sensitivity temperature sensor based on highly-birefringent microfiber
Author(s): Li-Peng Sun; Jie Li; Long Jin; Shuai Gao; Zhuang Tian; Yang Ran; Bai-Ou Guan
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Paper 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.

Paper Details

Date Published: 15 October 2013
PDF: 4 pages
Proc. SPIE 8924, Fourth Asia Pacific Optical Sensors Conference, 89240C (15 October 2013); doi: 10.1117/12.2034171
Show Author Affiliations
Li-Peng Sun, Jinan Univ. (China)
Jie Li, Jinan Univ. (China)
Long Jin, Jinan Univ. (China)
Shuai Gao, Jinan Univ. (China)
Zhuang Tian, Jinan Univ. (China)
Yang Ran, Jinan Univ. (China)
Bai-Ou Guan, Jinan Univ. (China)

Published in SPIE Proceedings Vol. 8924:
Fourth Asia Pacific Optical Sensors Conference
Minghong Yang; Dongning Wang; Yun-Jiang Rao, Editor(s)

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