Chinese Optics Letters, 2017, 15 (8): 082302, Published Online: Jul. 20, 2018   

Noise suppression for the detection laser of a nuclear magnetic resonance gyroscope based on a liquid crystal variable retarder Download: 1061次

Author Affiliations
1 School of Instrumentation Science and Opto-Electronics Engineering, Beihang University, Beijing 100191, China
2 Key Laboratory on Inertial Technology, Beijing 100191, China
Abstract
In this Letter, the liquid crystal variable phase retarder is applied for the accurate modulation of the laser power in a detection system and the construction of a system that suppresses the influence of laser noise on the gyro’s bias instability. A closed-loop control method for a laser noise suppression system is proposed. We obtain a power stability index of 0.038% in a 3-h continuous test, and the nuclear magnetic resonance gyroscope bias instability reaches 1°/h. The proposed control method effectively improves the signal-to-noise ratio of the gyroscope detection signal, which lays the technical foundation for future research work.

Binquan Zhou, Guanqun Lei, Linlin Chen, Wenfeng Wu, Zhuo Wang, Xiaofeng Meng, Jiancheng Fang. Noise suppression for the detection laser of a nuclear magnetic resonance gyroscope based on a liquid crystal variable retarder[J]. Chinese Optics Letters, 2017, 15(8): 082302.

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