Refractive index insensitive temperature sensor based on hollow annular core fiber Mach-Zehnder interferometer

Yaxun Zhang; Ai Zhou; Quan Xu; Boyang Qin; Zhihai Liu

doi:10.1117/12.2059532

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2 June 2014 Refractive index insensitive temperature sensor based on hollow annular core fiber Mach-Zehnder interferometer

Yaxun Zhang, Ai Zhou, Quan Xu, Boyang Qin, Zhihai Liu

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Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 915729 (2014) https://doi.org/10.1117/12.2059532
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

We propose a refractive index insensitive temperature sensor based on hollow annular core fiber (HACF) Mach-Zehnder interferometer (MZI). The HACF is composed of a large-diameter air hole, an annular core around the air hole and a cladding. The MZI is fabricated by inserting a short section of the HACF between two short multimode fibers, and the interference occurs between the light beams transmitting along the air hole and the annular core of the HACF. Experimental results show that the MZI is insensitive to external refractive index and has temperature sensitivity of 30 pm/°C.

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Yaxun Zhang, Ai Zhou, Quan Xu, Boyang Qin, and Zhihai Liu "Refractive index insensitive temperature sensor based on hollow annular core fiber Mach-Zehnder interferometer", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915729 (2 June 2014); https://doi.org/10.1117/12.2059532

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