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Proceedings Paper

High-sensitivity salinity sensor realized with photonic crystal fiber Sagnac interferometer
Author(s): Chuang Wu; H. Y. Fu; H. Y. Au; Bai-Ou Guan; H. Y. Tam
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Paper Abstract

We present a highly sensitive salinity sensor realized with a polyimide-coated polarization-maintaining photonic crystal fiber (PM-PCF) based on a Sagnac interferometer configuration. The achieved salinity sensitivity is as high as 0.616 nm/M which is 37 times more sensitive than that of previous reported polyimide-coated fiber grating sensor. It has a low temperature sensitivity of -0.0122 pm/°. The performance of the sensor in aqueous solution of NaCl with concentrations up to 5.12 mol/L has been experimentally investigated. The proposed fiber optic salinity sensor is a promising candidate for salinity measurement.

Paper Details

Date Published: 17 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77531B (17 May 2011); doi: 10.1117/12.886022
Show Author Affiliations
Chuang Wu, The Hong Kong Polytechnic Univ. (Hong Kong, China)
Dalian Univ. of Technology (China)
H. Y. Fu, The Hong Kong Polytechnic Univ. (Hong Kong, China)
H. Y. Au, The Hong Kong Polytechnic Univ. (Hong Kong, China)
Bai-Ou Guan, Dalian Univ. of Technology (China)
Jinan Univ. (China)
H. Y. Tam, The Hong Kong Polytechnic Univ. (Hong Kong, China)


Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors
Jacques Albert; Wojtek J. Bock, Editor(s)

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