Fiber loop ringdown strain sensor with photonic crystal fiber based Mach-Zehnder interferometer

Wenjun Zhou; Wei Chang Wong; Chi Chiu Chan; Li-Yang Shao; Xinyong Dong

doi:10.1117/12.884985

17 May 2011 Fiber loop ringdown strain sensor with photonic crystal fiber based Mach-Zehnder interferometer

Wenjun Zhou, Wei Chang Wong, Chi Chiu Chan, Li-Yang Shao, Xinyong Dong

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77530R (2011) https://doi.org/10.1117/12.884985
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

Abstract

A highly sensitive strain sensor is demonstrated by inserting a photonic crystal fiber (PCF) based Mach-Zehnder interferometer (MZI) in a cavity ringdown fiber loop as the lossy sensing element. The MZI consists of a piece of PCF spliced to single-mode fibers, in which the PCF air holes are collapsed over a short region at two splicing points for coupling the core and cladding modes. By measuring the decay constants of the fiber ringdown loop, a high strain sensitivity of ~0.21 μs-1/mε and a minimum detectable strain of ~3.6 με were obtained.

Citation Download Citation

Wenjun Zhou, Wei Chang Wong, Chi Chiu Chan, Li-Yang Shao, and Xinyong Dong "Fiber loop ringdown strain sensor with photonic crystal fiber based Mach-Zehnder interferometer", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77530R (17 May 2011); https://doi.org/10.1117/12.884985

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