Liang Yixiang, Jiang Liwei, Liu Jiali, Zhu Jun, Shao Qi, Fan Shimiao, Li Xiaoping, Quan Wei
Opt Express. 2022 Oct 10;30(21):38216-38228. doi: 10.1364/OE.470656.
We have developed a single-beam spin-exchange relaxation-free comagnetometer using elliptically polarized light for dual-axis rotation measurement. The light beam propagating through the glass cell is simultaneously used for optical pumping and signal extraction. Combined with transverse magnetic field modulation, the rotation information can be collected through a balanced polarimeter module and a lock-in amplifier. Also, we propose a decoupling method by adjusting the phase shift of the reference signal, allowing the device to realize biaxial signal decoupling while still maintaining its self-compensation state. Compared to those without decoupling, our method improves the performance of our device in its signal-to-noise ratio and rotation sensitivity. The single-beam comagnetometer scheme and the decoupling method have a positive impact on the development of miniaturized atomic sensors for high-precision inertial measurement.
我们开发了一种单光束自旋交换无弛豫共磁强计，它使用椭圆偏振光进行双轴旋转测量。穿过玻璃池的光束同时用于光泵浦和信号提取。结合横向磁场调制，旋转信息可以通过平衡偏振计模块和锁相放大器收集。此外，我们提出了一种通过调整参考信号相位偏移的解耦方法，使该装置在保持自补偿状态的同时实现双轴信号解耦。与未进行解耦的情况相比，我们的方法提高了装置的信噪比和旋转灵敏度。单光束共磁强计方案和解耦方法对用于高精度惯性测量的小型化原子传感器的发展具有积极影响。
