Refractive index and temperature sensor based on double-pass in-line Mach-Zehnder interferometer

Yi Li; Liang Chen; Edouard Harris; Xiaoyi Bao; Wojtek J Bock

doi:10.1117/12.884932

17 May 2011 Refractive index and temperature sensor based on double-pass in-line Mach-Zehnder interferometer

Yi Li, Liang Chen, Edouard Harris, Xiaoyi Bao, Wojtek J Bock

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77530Q (2011) https://doi.org/10.1117/12.884932
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

Abstract

Different from the conventional optical fiber in-line Mach-Zehnder interferometer (MZI), we proposed and demonstrated a novel double-pass in-line fiber taper MZI as a refractive index and temperature sensor in this study. The double-pass MZI is composed of a reflecting mirror, a circulator and an in-line fiber MZI. The attenuation peaks of the double-pass MZI spectra have higher contrasts than the peaks of single-pass spectra. Using our recently proposed spectrum differential integration (SDI) analyzing method, the double-pass MZI sensors' sensitivities can be made nearly twice as large as those of the single-pass ones.

Citation Download Citation

Yi Li, Liang Chen, Edouard Harris, Xiaoyi Bao, and Wojtek J Bock "Refractive index and temperature sensor based on double-pass in-line Mach-Zehnder interferometer", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77530Q (17 May 2011); https://doi.org/10.1117/12.884932

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