Ultra-high sensitive temperature sensor based on multimode fiber Mach-Zehnder interferometer

Ai Zhou; Yaxun Zhang; Yuanyuan Yang; Jun Yang; Zhihai Liu

doi:10.1117/12.2059534

2 June 2014 Ultra-high sensitive temperature sensor based on multimode fiber Mach-Zehnder interferometer

Ai Zhou, Yaxun Zhang, Yuanyuan Yang, Jun Yang, Zhihai Liu

Author Affiliations +

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91572A (2014) https://doi.org/10.1117/12.2059534
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

We propose an ultra-high sensitive temperature sensor based on multimode fiber (MMF) Mach-Zehnder interferometer (MZI). The multimode fiber MZI is composed of a short section of MMF inserting between another two pieces of MMFs with large lateral offset. The sensing head is packaged in a capillary which is filled with glycerol-water solution. At the offset splice interface, part of the light in the lead-in MMF is coupled into the glycerol-water solution around the sensing MMF and the remainder propagates along the cladding of the sensing MMF. Due to the large thermo-optic coefficient of the glycerol-water solution, the transmission spectrum of the MMF-based MZI shift quickly with temperature variation. Experimental results show that the temperature sensitivity is as high as 8.23 nm/°C.

Citation Download Citation

Ai Zhou, Yaxun Zhang, Yuanyuan Yang, Jun Yang, and Zhihai Liu "Ultra-high sensitive temperature sensor based on multimode fiber Mach-Zehnder interferometer", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91572A (2 June 2014); https://doi.org/10.1117/12.2059534

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