In-line fiber Mach-Zehnder interferometer combining with fiber Bragg grating for simultaneous curvature and temperature measurement

Xinyong Dong; Yan Zhou; Wenjun Zhou; Wei Chang Wong; Chi Chiu Chan; Li-Yang Shao; Jia Cheng

doi:10.1117/12.903447

22 November 2011 In-line fiber Mach-Zehnder interferometer combining with fiber Bragg grating for simultaneous curvature and temperature measurement

Xinyong Dong, Yan Zhou, Wenjun Zhou, Wei Chang Wong, Chi Chiu Chan, Li-Yang Shao, Jia Cheng

Author Affiliations +

Proceedings Volume 8199, 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications; 819903 (2011) https://doi.org/10.1117/12.903447
Event: International Conference on Optical Instruments and Technology (OIT2011), 2011, Beijing, Beijing, China

Abstract

A sensor head consisting of a photonic crystal fiber (PCF)-based Mach-Zehnder interferometer (MZI) and a fiber Bragg grating (FBG) is proposed and experimentally demonstrated for simultaneous measurement of curvature and temperature. The MZI fabricated by splicing a short length of PCF between two single-mode fibers with the air-holes structure completely collapsed near the splicing points, is sensitive to fiber bending and surrounding temperature, while the FBG is only sensitive to the later. Simultaneous measurement of curvature and temperature is therefore obtained. Sensitivities of 4.06 nm/m^-1 and 6.30 pm/°C are achieved experimentally for curvature and temperature, respectively. And the corresponding resolutions are 5.2x10^-4 m^-1 and 1.25 °C for curvature and temperature, respectively, based on the wavelength measurement resolution of 10 pm.

Citation Download Citation

Xinyong Dong, Yan Zhou, Wenjun Zhou, Wei Chang Wong, Chi Chiu Chan, Li-Yang Shao, and Jia Cheng "In-line fiber Mach-Zehnder interferometer combining with fiber Bragg grating for simultaneous curvature and temperature measurement", Proc. SPIE 8199, 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 819903 (22 November 2011); https://doi.org/10.1117/12.903447

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