1. A parametrically modulated dual-axis atomic spin gyroscope.
- Author
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Jiang, Liwei, Quan, Wei, Li, Rujie, Fan, Wenfeng, Liu, Feng, Qin, Jie, Wan, Shuangai, and Fang, Jiancheng
- Subjects
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GYROSCOPES , *ALKALI metals , *MAGNETOMETERS , *METAL vapors , *NOBLE gases - Abstract
We describe a dual-axis atomic spin gyroscope based on an alkali metal-noble gas comagnetometer. Alkali metal vapor is optically pumped, and then the noble gas is hyperpolarized along the
z axis. When sensing a transverse rotation, the polarized noble gas will be induced to precess and produce an effective magnetic field in thex –y plane for alkali metals to precess under. Operating in the spin-exchange relaxation-free regime, alkali atoms are modulated by thez axis magnetic field and serve as an integratedin-situ dual-axis magnetometer to detect the gyroscopic precession in thex andy axes simultaneously, using a single probe beam. By using the parametric modulation technique, the low frequency drift is effectively suppressed and a bias instability of less than 0.05 deg/h has been achieved in our dual-axis atomic spin gyroscope. [ABSTRACT FROM AUTHOR]- Published
- 2018
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