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Proceedings Paper

Study on the stabilization of an optical fiber interferometric sensor
Author(s): Jie Shao; Jian-yong Chen; Zhi-zong Wu; Qian-jin Tang
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Paper Abstract

Optical fiber interferometric (OFI) sensors have been extensively used to measure a large variety of parameters due to their superior performance. The F-P OFI sensors are very sensitive to the cavity-length changes. However, it is difficult to fix the operating position at the quadrature point (Q point) in the sensor fabrication, and the sensor may also encounter with various environmental perturbations, which may drive the sensors out of the linear region. For the purpose of developing a highly-sensitive and reliable OFI vibration sensor, a new method was proposed and demonstrated in our research. By choosing a short cavity length, we can obtain OFI sensor with large interference period, which is helpful to avoid the infection of Q point drifting, but the visibility decline problem will arise simultaneously. A tilted diaphragm method was used to solve this problem in the short cavity length. Theoretical analyses have been performed, and a tilted diaphragm optical fiber sensor has been fabricated, the result shows a visibility of nearly 100% is realized in a short cavity about 50μm.

Paper Details

Date Published: 24 August 2009
PDF: 7 pages
Proc. SPIE 7381, International Symposium on Photoelectronic Detection and Imaging 2009: Material and Device Technology for Sensors, 73811V (24 August 2009); doi: 10.1117/12.835590
Show Author Affiliations
Jie Shao, Third Research Institute of the Ministry of Public Security (China)
Jian-yong Chen, Third Research Institute of the Ministry of Public Security (China)
Zhi-zong Wu, Third Research Institute of the Ministry of Public Security (China)
Qian-jin Tang, Third Research Institute of the Ministry of Public Security (China)


Published in SPIE Proceedings Vol. 7381:
International Symposium on Photoelectronic Detection and Imaging 2009: Material and Device Technology for Sensors
Xu-yuan Chen; Yue-lin Wang; Zhi-ping Zhou; Qing-kang Wang, Editor(s)

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