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Chin. Phys. B, 2019, Vol. 28(11): 110701    DOI: 10.1088/1674-1056/ab44a5
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Low drift nuclear spin gyroscope with probe light intensity error suppression

Wenfeng Fan(范文峰)1, Wei Quan(全伟)1,2,3, Feng Liu(刘峰)1, Lihong Duan(段利红)1, Gang Liu(刘刚)1,2,3
1 School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China;
2 Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, Beihang University, Beijing 100191, China;
3 Beijing Academy of Quantum Information Sciences, Beijing 100193, China
Abstract  A nuclear spin gyroscope based on an alkali-metal-noble-gas co-magnetometer operated in spin-exchange relaxation-free (SERF) regime is a promising atomic rotation sensor for its ultra-high fundamental sensitivity. However, the fluctuation of probe light intensity is one of the main technical error sources that limits the bias stability of the gyroscope. Here we propose a novel method to suppress the bias error induced by probe light intensity fluctuations. This method is based on the inherent magnetic field response characteristics of the gyroscope. By the application of a bias magnetic field, the gyroscope can be tuned to a working point where the output signal is insensitive to probe light intensity variation, referred to herein as ‘zero point’, thus the bias error induced by intensity fluctuations can be completely suppressed. The superiority of the method was verified on a K-Rb-21Ne co-magnetometer, and a bias stability of approximately 0.01°/h was obtained. In addition, the method proposed here can remove the requirement of the closed-loop control of probe light intensity, thereby facilitating miniaturization of the gyroscope volume and improvement of reliability.
Keywords:  nuclear spin gyroscope      spin-exchange relaxation-free      error suppression      probe light intensity  
Received:  04 August 2019      Revised:  30 October 2019      Accepted manuscript online: 
PACS:  07.07.Df (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)  
  07.55.Ge (Magnetometers for magnetic field measurements)  
  42.79.-e (Optical elements, devices, and systems)  
Fund: Project supported by the National Key Research and Development Program of China (Grant Nos. 2016YFB0501600 and 2017YFB0503100) and the National Natural Science Foundation of China (Grant Nos. 61773043, 61673041, and 61721091).
Corresponding Authors:  Wenfeng Fan     E-mail:

Cite this article: 

Wenfeng Fan(范文峰), Wei Quan(全伟), Feng Liu(刘峰), Lihong Duan(段利红), Gang Liu(刘刚) Low drift nuclear spin gyroscope with probe light intensity error suppression 2019 Chin. Phys. B 28 110701

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