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Proceedings Paper

Strain-insensitive optical fiber Mach-Zehnder interferometric temperature sensor
Author(s): Yingyu Yu; Lan Jiang; Sumei Wang; Jinpeng Yang; Benye Li
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Paper 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.

Paper Details

Date Published: 22 November 2011
PDF: 6 pages
Proc. SPIE 8199, 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 81991N (22 November 2011); doi: 10.1117/12.921252
Show Author Affiliations
Yingyu Yu, Beijing Institute of Technology (China)
Lan Jiang, Beijing Institute of Technology (China)
Sumei Wang, Beijing Institute of Technology (China)
Jinpeng Yang, Beijing Institute of Technology (China)
Benye Li, Beijing Institute of Technology (China)


Published in SPIE Proceedings Vol. 8199:
2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications
Brian Culshaw; YanBiao Liao; Anbo Wang; Xiaoyi Bao; Xudong Fan, Editor(s)

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