Strain-insensitive optical fiber Mach-Zehnder interferometric temperature sensor

Yingyu Yu; Lan Jiang; Sumei Wang; Jinpeng Yang; Benye Li

doi:10.1117/12.921252

22 November 2011 Strain-insensitive optical fiber Mach-Zehnder interferometric temperature sensor

Yingyu Yu, Lan Jiang, Sumei Wang, Jinpeng Yang, Benye Li

Proceedings Volume 8199, 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications; 81991N (2011) https://doi.org/10.1117/12.921252
Event: International Conference on Optical Instruments and Technology (OIT2011), 2011, Beijing, Beijing, China

Abstract

A fiber Mach-Zehnder interferometer (MZI) constructed by concatenating a micro cavity in the fiber core and a taper is proposed and applied for temperature sensing. Femtosecond laser micro-machining technique and fusion splicing technique are utilized to fabricate the micro cavity in a single mode optical fiber core. The fiber taper is fabricated by electric arc-discharge with a conventional fusion splicer. A sensitivity of 68 pm/°C is obtained at the temperature range of 200-400°C. The interferometer is also characterized by different strain.It exhibits very low strain sensitivity because only low order cladding modes are excited by the micro cavity, which is a desirable merit for temperature sensor to eliminate cross sensitivity to strain.

Citation Download Citation

Yingyu Yu, Lan Jiang, Sumei Wang, Jinpeng Yang, and Benye Li "Strain-insensitive optical fiber Mach-Zehnder interferometric temperature sensor", Proc. SPIE 8199, 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 81991N (22 November 2011); https://doi.org/10.1117/12.921252

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