Abstract

We propose a method of combining a double optical path detection system with a phase generation carrier arctangent algorithm. The feasibility of eliminating the influence of modulation depth by the double optical path detection vibration measurement system is verified by simulation and experiment. Results show that the average total harmonic distortion of the single frequency signal is 1%, and the signal-to-noise ratio of the speech signal is improved by an average of 5.6 dB. Therefore, the double optical path detection system can eliminate the influence of modulation depth, avoid nonlinear distortion, and improve the detection performance of the system.

© 2022 Optica Publishing Group

Improved PGC demodulation algorithm to eliminate modulation depth and intensity disturbance

Yangtaozi Li, Hong Gao, Liguo Zhao, Zhipeng Fu, Juan Zhang, Zhen Li, and Xueguang Qiao
Appl. Opt. 61(19) 5722-5727 (2022)

High-stability PGC demodulation technique with an additional sinusoidal modulation based on an auxiliary reference interferometer and EFA

Shengquan Mu, Benli Yu, Lei Gui, Jinhui Shi, Dong Guang, Cheng Zuo, Wujun Zhang, Xiaonan Zhao, and Xuqiang Wu
Opt. Express 30(15) 26941-26954 (2022)

Interferometric sensor with a PGC-AD-DSM demodulation algorithm insensitive to phase modulation depth and light intensity disturbance

Ailing Zhang and Dan Li
Appl. Opt. 57(27) 7950-7955 (2018)

Improved PGC demodulation algorithm for fiber optic interferometric sensors

Mingda Zhu, Xinxin Wang, Jiaying Chang, and Haoyu Zhou
Opt. Express 32(2) 2162-2178 (2024)

Improved phase generated carrier demodulation algorithm for eliminating light intensity disturbance and phase modulation amplitude variation

Youwan Tong, Hualin Zeng, Liyan Li, and Yan Zhou
Appl. Opt. 51(29) 6962-6967 (2012)