Abstract
Phase interrogation methods for fiber-optic Fabry–Perot (F-P) sensors may inevitably fail in the field due to the influences of irrelevant factors on signal intensity. To address this severe problem, this Letter proposes an intensity self-compensation method (ISCM) to eliminate the consecutive signal fluctuations of a polarization-based F-P interrogation system caused by multiple factors. By providing only the initial intensities of the reference signals, this attempt realizes the real-time intensity compensation of the output signals without affecting their quadrature relationship. Consecutive intensity fluctuations caused by variation of light source power, fiber loss, and polarization state are reduced to 2%–3% by the ISCM. Furthermore, the method performs ideally under dynamic modulation of the sensor. In addition, it can be applied against the inconsistent fluctuations between signals and is suitable for F-P sensors with single or multiple cavities. Owing to the high efficiency, real-time ability, and no moving parts advantage, the proposed method provides an excellent candidate for improving the accuracy and stability of F-P interrogation systems.
© 2022 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Ji Xia, Shuidong Xiong, Fuyin Wang, and Hong Luo
Opt. Lett. 41(13) 3082-3085 (2016)
Zhihao Yu, Zhipeng Tian, and Anbo Wang
Opt. Lett. 42(4) 727-730 (2017)
Qiang Liu, Zhenguo Jing, Yueying Liu, Ang Li, Yang Zhang, Zhiyuan Huang, Ming Han, and Wei Peng
Opt. Lett. 44(22) 5402-5405 (2019)