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Proceedings Paper

Gas refractometer based on an S-taper fiber tailored fiber Bragg grating
Author(s): Zhihua Shao; Weijia Bao; Xueguang Qiao; Qiangzhou Rong
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Paper Abstract

A fiber Bragg grating (FBG)-based gas refractometer is proposed and demonstrated experimentally. The configuration consists of a short section of S-type taper followed with a FBG. The S-taper is capable to couple the core mode to cladding modes into the downstream SMF, and the low-order cladding modes can be reflected back to the fiber core via the FBG, in which the recoupling efficiency is highly dependent on surrounding refractive index (RI) of liquid and gas. Experimental results show that some recoupled cladding modes show high sensitivities to surround RI. This power-referenced RI measurement and wavelength-referenced temperature measurement have been achieved via selective cladding modes monitoring.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96340R (28 September 2015); doi: 10.1117/12.2194523
Show Author Affiliations
Zhihua Shao, Northwest Univ. (China)
Weijia Bao, Northwest Univ. (China)
Xueguang Qiao, Northwest Univ. (China)
Qiangzhou Rong, Northwest Univ. (China)


Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

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