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Proceedings Paper

Variable optical reflector and strain sensor using multimode fiber Bragg grating and mode conversion
Author(s): Zhihao Chen; Xiufeng Yang; Jun Hong Ng; Xiaoqun Zou; Chao Lu
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Paper Abstract

We report on a narrow band optical fiber filter utilizing a multimode fiber Bragg grating and fiber mode scrambler in order to tune its reflectivity that is useful as variable optical reflector and strain sensor. A change of reflectivity from 81% to 2% is achieved. We develop a novel fiber Bragg grating strain sensor that allows strain to be applied in the portion of the multimode fiber without grating. Particular advantages of this strain sensor are simple design, low system cost and high sensitivity. A strain sensitivity of 0.0013%/microstrain in change of reflectivity and large dynamic range (0-7,000 microstrain) are demonstrated. The strain sensitivity can be improved greatly by using efficient mode conversion structure in the device.

Paper Details

Date Published: 23 May 2005
PDF: 4 pages
Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); doi: 10.1117/12.623379
Show Author Affiliations
Zhihao Chen, Institute for Infocomm Research (Singapore)
Xiufeng Yang, Institute for Infocomm Research (Singapore)
Jun Hong Ng, Institute for Infocomm Research (Singapore)
Xiaoqun Zou, Institute for Infocomm Research (Singapore)
Chao Lu, Institute for Infocomm Research (Singapore)

Published in SPIE Proceedings Vol. 5855:
17th International Conference on Optical Fibre Sensors
Marc Voet; Reinhardt Willsch; Wolfgang Ecke; Julian Jones; Brian Culshaw, Editor(s)

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