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Proceedings Paper

Analysis of temperature-insensitive sensor probe for SRI measurement via etched cladding FM-FBG
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Paper Abstract

A novel temperature-insensitive sensor probe is proposed and experimentally characterized. The sensor probe uses an etching cladding Few Mode Fiber Bragg Grating (FM-FBG) to sense the surrounding refractive indexes (SRI), which depends on the reflection peaks. To compensate for the temperature effect in SRI sensing, various guides modes in FM-FBG that have the different sensing behaviors are used for implementation. Both the propagation characteristics and operation principle of such a sensor are demonstrated in detail. A sensitivity of ~2 nm per refractive index unit (RIU) are obtained within the SRI range of 1.333–1.373. This sensor is temperature independent due to the temperature-insensitive nature of wavelength differential Δλ between the two reflection peaks of the etching cladding FM-FBG.

Paper Details

Date Published: 18 December 2019
PDF: 6 pages
Proc. SPIE 11340, AOPC 2019: Optical Fiber Sensors and Communication, 113401J (18 December 2019); doi: 10.1117/12.2547861
Show Author Affiliations
Xiao Liang, Minzu Univ. of China (China)
Zhaoxin Geng, Minzu Univ. of China (China)
Jingcong Li, Minzu Univ. of China (China)
Zhiming Liu, The 41st Research Institute of CETC (China)

Published in SPIE Proceedings Vol. 11340:
AOPC 2019: Optical Fiber Sensors and Communication
Jie Zhang; Songnian Fu; Jun Yang, Editor(s)

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