Highly sensitive temperature sensor using intrinsic Mach-Zehnder interferometer formed by bent micro-fiber embedded in polymer

Pathi Munendhar; Lei Zhang; Limin Tong; Shaoliang Yu

doi:10.1117/12.2265817

23 April 2017 Highly sensitive temperature sensor using intrinsic Mach-Zehnder interferometer formed by bent micro-fiber embedded in polymer

Pathi Munendhar, Lei Zhang, Limin Tong, Shaoliang Yu

Author Affiliations +

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103234P (2017) https://doi.org/10.1117/12.2265817
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

We reported a simple, robust, and highly sensitive temperature sensor using intrinsic Mach-Zehnder interferometer formed by means of bending a tapered microfiber, embedded in polydimethylsiloxane. The outer temperature perturbations modulate the refractive index of the polymer through thermo-optic and thermal expansion effects of the polymer. This leads to a phase difference between interfering guided modes through the bent-microfiber, which ultimately results prominent wavelength shift in the transmission spectrum. The sensor exhibits a linear temperature response with a sensitivity as high as -6.25nm/°C over the temperature range from 24° to 40 °C. The sensitivity of the sensor increases as wavelength increases.

Citation Download Citation

Pathi Munendhar, Lei Zhang, Limin Tong, and Shaoliang Yu "Highly sensitive temperature sensor using intrinsic Mach-Zehnder interferometer formed by bent micro-fiber embedded in polymer", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103234P (23 April 2017); https://doi.org/10.1117/12.2265817

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