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Proceedings Paper

A ratio method of FCG demodulation on strain measurement
Author(s): Weilai Li; Miao Gao; Jianjun Pan; Shunfan He
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Paper Abstract

To use FCG (Fiber Chirp Grating) as intensity demodulating sensor, the environmental interference should be eliminated, a method of signal ratio is used. Three FCGs and paired fibers are used in strain measurement, two FCGs are connected in series with the first fiber, one acts as a tensive sensor, the other acts as a compressive sensor. The third FCG is alone connected with the second fiber and acts as a reference. Sensing FCGs' intensity output is divided by reference's. Although the level of interference was put as high as the level of load, the ratio is still of good responsibility with the stress, and is of good linearity, and the maximum error in full range is 1.5%.

Paper Details

Date Published: 29 October 2009
PDF: 6 pages
Proc. SPIE 7514, Photonics and Optoelectronics Meetings (POEM) 2009: Fiber Optic Communication and Sensors, 751406 (29 October 2009); doi: 10.1117/12.845395
Show Author Affiliations
Weilai Li, Wuhan Univ. of Technology (China)
Miao Gao, Wuhan Univ. of Technology (China)
Jianjun Pan, Wuhan Univ. of Technology (China)
Shunfan He, Wuhan Univ. of Technology (China)


Published in SPIE Proceedings Vol. 7514:
Photonics and Optoelectronics Meetings (POEM) 2009: Fiber Optic Communication and Sensors
Dieter Stefan Jäger; Hequan Wu; Shuisheng Jian; Desheng Jiang; Deming Liu; Weiwei Dong; Qizhen Sun; Xiaochun Xiao, Editor(s)

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