Microfiber Bragg grating for liquid-level variation sensing

Bo Lin; Swee Chuan Tjin; Yu Zhang; Bo Dong; Jianzhong Hao

doi:10.1117/12.884933

17 May 2011 Microfiber Bragg grating for liquid-level variation sensing

Bo Lin, Swee Chuan Tjin, Yu Zhang, Bo Dong, Jianzhong Hao

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77537K (2011) https://doi.org/10.1117/12.884933
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

Abstract

We report a liquid-level variation sensor based on a fiber Bragg grating (FBG) inscribed in a 6.5-μmdiameter microfiber. The proposed microfiber Bragg grating (MFBG) in air has two separated reflection peaks, which are caused by the fundamental mode reflection and the higher-order mode reflection. Each of the two peaks will split into another two adjacent peaks when a fraction of the MFBG sensor immerses into liquid. By measuring the reflectivity difference between the two original peaks and their respective adjacent liquid-induced peaks, the liquid-level variation can be determined.

Citation Download Citation

Bo Lin, Swee Chuan Tjin, Yu Zhang, Bo Dong, and Jianzhong Hao "Microfiber Bragg grating for liquid-level variation sensing", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77537K (17 May 2011); https://doi.org/10.1117/12.884933

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