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9 September 2002 Novel bend sensor using optical fiber microbend effect
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A novel of bend sensor is demonstrated firstly. The device uses a simple support beam composing of two beams with a metal line winded on each beam and multimode fiber of a few meters in length which is placed between two beams having metal teeth profile such that the fiber experiences multiple bends. The experiment shows that the microbend loss of the multimode optical fiber is sensitive to the simple support beam bend curvature. The microbend loss with curvatures from 0 to 4.4m-1 is examined. The microbend loss with curvature is nonlinear, with a minimum detectable curvature change of 0.0175m-1.
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Yonglin Huang, Zhaowen Xu, Yifei Yang, Zhengrong Tong, Guiyun Kai, and Xiaoyi Dong "Novel bend sensor using optical fiber microbend effect", Proc. SPIE 4920, Advanced Sensor Systems and Applications, (9 September 2002);

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