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Proceedings Article

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

[+] Author Affiliations
Chuang Wu

The Hong Kong Polytechnic Univ. (Hong Kong, China) and Dalian Univ. of Technology (China)

H. Y. Fu, H. Y. Au, H. Y. Tam

The Hong Kong Polytechnic Univ. (Hong Kong, China)

Bai-Ou Guan

Dalian Univ. of Technology (China) and Jinan Univ. (China)

Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77531B (May 17, 2011); doi:10.1117/12.886022
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From Conference Volume 7753

  • 21st International Conference on Optical Fiber Sensors
  • Ottawa, Canada | May 15, 2011

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.

© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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 (May 17, 2011); doi:10.1117/12.886022; http://dx.doi.org/10.1117/12.886022


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