24 July 2018 An improved PGC demodulation algorithm of interferometric sensor for eliminating the intensity disturbance
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Proceedings Volume 10827, Sixth International Conference on Optical and Photonic Engineering (icOPEN 2018); 108273E (2018) https://doi.org/10.1117/12.2327134
Event: Sixth International Conference on Optical and Photonic Engineering (icOPEN 2018), 2018, Shanghai, China
Abstract
A modified phase generated carrier (PGC) demodulation algorithm for interferometric sensor is presented in this letter. Compared with the differential-cross-multiplying measure (PGC-DCM algorithm), the effect of light intensity disturbance (LID) is eliminated. Additionally, the harmonic distortion of arctangent measure (PGC-arctan algorithm) is well suppressed. In the experiment, while the simulated LID frequency is settled to 50 Hz, the signal-to-noise of the improved PGC algorithm respectively receives an increase of 10.3 dB and 18.2 dB over PGC-DCM and PGC-Arctan algorithms. The system has a dynamic range of 45.9 dB at 600 Hz by employing the improved PGC demodulation algorithm.
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Xiudong Liang, Xiudong Liang, Xinxin Li, Xinxin Li, Shenglai Zhen, Shenglai Zhen, Xuqiang Wu, Xuqiang Wu, Kai Qian, Kai Qian, Benli Yu, Benli Yu, } "An improved PGC demodulation algorithm of interferometric sensor for eliminating the intensity disturbance", Proc. SPIE 10827, Sixth International Conference on Optical and Photonic Engineering (icOPEN 2018), 108273E (24 July 2018); doi: 10.1117/12.2327134; https://doi.org/10.1117/12.2327134
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