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Proceedings Paper

Microfiber Bragg grating for liquid-level variation sensing
Author(s): Bo Lin; Swee Chuan Tjin; Yu Zhang; Bo Dong; Jianzhong Hao
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Paper 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.

Paper Details

Date Published: 18 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77537K (18 May 2011); doi: 10.1117/12.884933
Show Author Affiliations
Bo Lin, Nanyang Technological Univ. (Singapore)
Swee Chuan Tjin, Nanyang Technological Univ. (Singapore)
Yu Zhang, Huazhong Univ. of Science and Technology (China)
Bo Dong, Institute for Infocomm Research (Singapore)
Jianzhong Hao, Institute for Infocomm Research (Singapore)


Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors

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