Temperature-referenced high-sensitivity point-probe optical fiber chem-sensors based on cladding etched fiber Bragg gratings

Kaiming Zhou; Xianfeng Chen; George Simpson; Donghui Zhao; Lin Zhang; Ian Bennion

doi:10.1117/12.545708

1 September 2004 Temperature-referenced high-sensitivity point-probe optical fiber chem-sensors based on cladding etched fiber Bragg gratings

Kaiming Zhou, Xianfeng Chen, George Simpson, Donghui Zhao, Lin Zhang, Ian Bennion

Author Affiliations +

Proceedings Volume 5459, Optical Sensing; (2004) https://doi.org/10.1117/12.545708
Event: Photonics Europe, 2004, Strasbourg, France

Abstract

Point-probe optical fiber chem-sensors have been implemented using cladding etched fiber Bragg gratings. The sensors possess refractive index sensing capability that can be utilized to measure chemical concentrations. The Bragg wavelength shift reaches 8 nm when the index of surrounding medium changes from 1.33 to 1.44, giving maximum sensitivity more than 10 times higher than that of previously reported devices. More importantly, the dual-grating configuration of the point-probe sensors offers a temperature reference function, permitting accurate measurement of refractive index encoded chemical concentrations.

Citation Download Citation

Kaiming Zhou, Xianfeng Chen, George Simpson, Donghui Zhao, Lin Zhang, and Ian Bennion "Temperature-referenced high-sensitivity point-probe optical fiber chem-sensors based on cladding etched fiber Bragg gratings", Proc. SPIE 5459, Optical Sensing, (1 September 2004); https://doi.org/10.1117/12.545708

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