Stabilization of optical Fabry–Perot sensor by active feedback control of diode laser

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• 作者：Jianyong Chen ; Dijun Chen ; Jianxin Geng ; Jun li ; Haiwen Cai ; Zujie Fang
• 关键词：FFPI ; Visibility ; Interference operation point ; Active stabilization
• 刊名：Sensors and Actuators A: Physical
• 出版年：2008
• 出版时间：3 December 2008
• 年：2008
• 卷：148
• 期：2
• 页码：376-380
• 全文大小：592 K

文摘

This paper presents the design and characterization of a fiber Fabry–Perot interferometer (FFPI) acoustic wave detector with its Q point being stabilized actively. The relationship between the reflectivity of the F–P cavity facets and cavity length was theoretically analyzed, and high visibility of 100 % was realized by optimized design of the F–P cavity. To prevent the drifting of the Q point, a new stabilization method by actively feedback controlling of the diode laser is proposed and demonstrated, indicating the method is simple and easy operating. Measurement shows that good tracing of Q point was effectively realized.