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Proceedings Paper

Differential FBG sensor for temperature-independent refractive index measurement
Author(s): Shuai Gao; Long Jin; Li-Peng Sun; Jie Li; Bai-Ou Guan
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Paper Abstract

We demonstrated a simple method for temperature-independent refractive index measurement by use of two cascaded fiber Bragg gratings fabricated in single-mode fiber and microfiber, respectively. The reflective peaks of the two FBGs exhibit almost identical temperature sensitivity of 10.1 pm/°C and different responses to ambient refractive index. Based on the differential measurement method, of the issue of temperature cross-sensitivity for FBG sensors is solved. The refractive-index sensitivity of the sensor is 17.22 nm/RIU when the diameter of microfiber is 6.5 μm.

Paper Details

Date Published: 15 October 2013
PDF: 4 pages
Proc. SPIE 8924, Fourth Asia Pacific Optical Sensors Conference, 89243H (15 October 2013); doi: 10.1117/12.2034251
Show Author Affiliations
Shuai Gao, Jinan Univ. (China)
Long Jin, Jinan Univ. (China)
Li-Peng Sun, Jinan Univ. (China)
Jie Li, 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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