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Proceedings Paper

High sensitivity fiber optic accelerometer based on folding F-P cavity
Author(s): Zhong-zhu Yang; Hong Luo; Shui-dong Xiong
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Paper Abstract

The mutual restriction relationship between the acceleration sensitivity and the resonant frequency blocked the improvement of the performance of the common fiber optic F-P accelerometer. A new type of optic fiber accelerometer based on the folding F-P cavity was introduced in this article. The phase changes caused by a certain acceleration signal are amplified through the multiple reflections of the light in the F-P cavity. Since the optical structure has no effects on the resonance frequency of the system, the acceleration sensitivity can be improved while the resonance frequency remains unchanged. The theoretical sensitivity and resonant frequency are analyzed. A collimator lens with the gradient index fiber is used to reduce the losses of the longitudinal displacement in the F-P cavity. The results show that the improvement of the sensitivity is directly proportional to the times of reflections of the light in the cavity. The theoretical sensitivity can reach 26~30dB 30dB while the resonant frequency of the accelerometer is kept at 800Hz

Paper Details

Date Published: 29 August 2013
PDF: 7 pages
Proc. SPIE 8914, International Symposium on Photoelectronic Detection and Imaging 2013: Fiber Optic Sensors and Optical Coherence Tomography, 891411 (29 August 2013); doi: 10.1117/12.2034550
Show Author Affiliations
Zhong-zhu Yang, National Univ. of Defense Technology (China)
Hong Luo, National Univ. of Defense Technology (China)
Shui-dong Xiong, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 8914:
International Symposium on Photoelectronic Detection and Imaging 2013: Fiber Optic Sensors and Optical Coherence Tomography
Yunjiang Rao, Editor(s)

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