High sensitivity temperature sensor using microfiber based Mach-Zehnder interferometer

Ruibing Liang; Qizhen Sun; Jianghai Wo; Jiejun Zhang; Weihua Jia; Deming Liu

doi:10.1117/12.974346

7 November 2012 High sensitivity temperature sensor using microfiber based Mach-Zehnder interferometer

Ruibing Liang, Qizhen Sun, Jianghai Wo, Jiejun Zhang, Weihua Jia, Deming Liu

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84217U (2012) https://doi.org/10.1117/12.974346
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

A high sensitive temperature sensor based on Mach-Zehnder interferometer (MZI) is proposed and experimentally demonstrated. Temperature measurement is achieved by immerging a section of microfiber into the refractive index (RI) liquid with a high thermo-optic coefficient. A slight change of ambient temperature will lead to the enhanced variation of the liquid index. Due to the evanescent field of microfiber, microfiber effective refractive index will be changed, and subsequently the optical length. Thus, by measuring the free spectral range (FSR) of the MZI, the temperature sensor can achieve a high sensitivity of 6.44nm/°C at the temperature of 20.6°C.

Citation Download Citation

Ruibing Liang, Qizhen Sun, Jianghai Wo, Jiejun Zhang, Weihua Jia, and Deming Liu "High sensitivity temperature sensor using microfiber based Mach-Zehnder interferometer", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84217U (7 November 2012); https://doi.org/10.1117/12.974346

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