A parametrically modulated dual-axis atomic spin gyroscope
| Autor: | Liwei Jiang, Wei Quan, Rujie Li, Shuangai Wan, Jiancheng Fang, Feng Liu, Wenfeng Fan, Jie Qin |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Physics and Astronomy (miscellaneous) Magnetometer 010401 analytical chemistry Noble gas Gyroscope Rotation 01 natural sciences 0104 chemical sciences law.invention Magnetic field Optical pumping Transverse plane law 0103 physical sciences Physics::Atomic and Molecular Clusters Physics::Atomic Physics Atomic physics 010306 general physics Beam (structure) |
| Zdroj: | Applied Physics Letters. 112:054103 |
| ISSN: | 1077-3118 0003-6951 |
| Popis: | 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 the x – y plane for alkali metals to precess under. Operating in the spin-exchange relaxation-free regime, alkali atoms are modulated by the z axis magnetic field and serve as an integrated in-situ dual-axis magnetometer to detect the gyroscopic precession in the x and y 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. |
| Databáze: | OpenAIRE |
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