High-sensitivity salinity sensor realized with photonic crystal fiber Sagnac interferometer

Chuang Wu; H. Y. Fu; H. Y. Au; Bai-Ou Guan; H. Y. Tam

doi:10.1117/12.886022

17 May 2011 High-sensitivity salinity sensor realized with photonic crystal fiber Sagnac interferometer

Chuang Wu, H. Y. Fu, H. Y. Au, Bai-Ou Guan, H. Y. Tam

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77531B (2011) https://doi.org/10.1117/12.886022
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

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.

Citation Download Citation

Chuang Wu, H. Y. Fu, H. Y. Au, Bai-Ou Guan, and H. Y. Tam "High-sensitivity salinity sensor realized with photonic crystal fiber Sagnac interferometer", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77531B (17 May 2011); https://doi.org/10.1117/12.886022

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