In-fiber Michelson interferometer based on double-cladding fiber for refractive index sensing

Fufei Pang; Huanhuan Liu; Na Chen; Yunqi Liu; Xianglong Zeng; Zhenyi Chen; Tingyun Wang

doi:10.1117/12.834097

5 October 2009 In-fiber Michelson interferometer based on double-cladding fiber for refractive index sensing

Fufei Pang, Huanhuan Liu, Na Chen, Yunqi Liu, Xianglong Zeng, Zhenyi Chen, Tingyun Wang

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75036Y (2009) https://doi.org/10.1117/12.834097
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

An in-fiber Michelson interferometer is proposed based on a double-cladding (DC) special fiber. With the DC special fiber, light wave can be partially coupled into outer cladding. The in-fiber Michelson interferometer can be constructed by splicing a length of DC fiber into standard single mode fiber (SMF). The interferometer is very sensitive to ambient refractive index change because fiber cladding is as one of interference arms. A sensitivity of 36nm/RIU has been achieved in the range of 1.33~1.40 in this work. The proposed technique has the dominant advantage of simple fabrication process, which can be expected to have wide applications in biosensors and chemical sensors.

Citation Download Citation

Fufei Pang, Huanhuan Liu, Na Chen, Yunqi Liu, Xianglong Zeng, Zhenyi Chen, and Tingyun Wang "In-fiber Michelson interferometer based on double-cladding fiber for refractive index sensing", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75036Y (5 October 2009); https://doi.org/10.1117/12.834097

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