中国物理B ›› 2019, Vol. 28 ›› Issue (11): 110701-110701.doi: 10.1088/1674-1056/ab44a5

• GENERAL • 上一篇    下一篇

Low drift nuclear spin gyroscope with probe light intensity error suppression

Wenfeng Fan(范文峰), Wei Quan(全伟), Feng Liu(刘峰), Lihong Duan(段利红), Gang Liu(刘刚)   

  1. 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
  • 收稿日期:2019-08-04 修回日期:2019-10-30 出版日期:2019-11-05 发布日期:2019-11-05
  • 通讯作者: Wenfeng Fan E-mail:fanwenfeng@buaa.edu.cn
  • 基金资助:
    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).

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. 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
  • Received:2019-08-04 Revised:2019-10-30 Online:2019-11-05 Published:2019-11-05
  • Contact: Wenfeng Fan E-mail:fanwenfeng@buaa.edu.cn
  • Supported by:
    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).

摘要: 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.

关键词: nuclear spin gyroscope, spin-exchange relaxation-free, error suppression, probe light intensity

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.

Key words: nuclear spin gyroscope, spin-exchange relaxation-free, error suppression, probe light intensity

中图分类号:  (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)

  • 07.07.Df
07.55.Ge (Magnetometers for magnetic field measurements) 42.79.-e (Optical elements, devices, and systems)