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Proceedings Paper

A low-cost multimode fiber Bragg grating sensor system
Author(s): Tongyu Liu; Daorui Wang; Rasool Raenaei; Xianfeng Chen; Lin Zhang; Ian Bennion
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Paper Abstract

A low-cost fiber optic sensor system based on multimode fiber and an LED light source is presented. A multimode fiber Bragg grating (MMFBG) element is used as a strain sensor. In a matched grating scheme, a MMFBG similar to the sensing one was used as a reference in the receiving unit. For detection of large wavelength shift we demonstrated the feasibility of MMFBG wavelength detection using a single mode fiber fused coupler edge filter. The high cost normally associated with wavelength interrogators for single mode fiber FBG sensors was overcome by the utilization of a low cost multimode fiber pigtailed LED light source. The multimode fiber sensing system has the potential of maintaining much of the advantages of its single mode FBG sensor system counterparts. The MMFBG sensing schemes could be used for short distance, high sensitivity, high speed, strain, temperature and acoustic sensing applications

Paper Details

Date Published: 14 February 2005
PDF: 8 pages
Proc. SPIE 5634, Advanced Sensor Systems and Applications II, (14 February 2005); doi: 10.1117/12.576055
Show Author Affiliations
Tongyu Liu, Intelligent Sensor Systems Ltd. (United Kingdom)
Daorui Wang, Shangdong Laser Institute, Shandong Academy of Science (China)
Rasool Raenaei, Intelligent Sensor Systems Ltd. (United Kingdom)
Xianfeng Chen, Aston Univ. (United Kingdom)
Lin Zhang, Aston Univ. (United Kingdom)
Ian Bennion, Aston Univ. (United Kingdom)


Published in SPIE Proceedings Vol. 5634:
Advanced Sensor Systems and Applications II
Yun-Jiang Rao; Osuk Y. Kwon; Gang-Ding Peng, Editor(s)

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