光学学报, 2019, 39 (1): 0112001, 网络出版: 2019-05-10
基于圆偏振探测光的光纤原子自旋进动检测技术 下载: 1133次
Detection Method of Fiber Atomic Spin Precession Based on Circularly Polarized Probe Light
测量 光纤光学 相干检测 原子自旋进动检测 Sagnac干涉仪 无自旋交换弛豫 圆偏振光 measurement fiber optics coherent detection atomic spin precession detection Sagnac interferometer spin-exchanged relaxation free circularly polarized light
摘要
分析了极化碱金属气室的旋光特性,极化的原子气室宏观上可等效为一种法拉第旋光晶体,其旋光系数与原子自旋进动相关。提出了采用圆偏振探测光测量通过气室的左右旋圆偏振光相位差来实现原子自旋进动检测的思路。基于改进的全光纤反射型Sagnac干涉仪,搭建了光纤原子自旋进动检测系统,通过圆偏振探测光实现了无自旋交换弛豫态自旋进动信号的检测。在原子自旋陀螺仪实验平台上进行了实验验证并实现了陀螺效应,实验结果证明了所提理论的正确性。对陀螺性能进行了初步测试,得到其零偏不稳定性为0.29 (°)/h。
Abstract
The optical rotation property of a polarized alkali vapor cell is demonstrated. The polarized atomic gas chamber can be macroscopically equivalent to a Faraday polarized crystal, whose optical rotation coefficient is related to the spin precession of atoms. A novel atomic spin precession detection scheme is proposed by means of the detection of the phase difference between the left and the right circularly polarized probe lights when a circularly polarized probe light is propagating through the vapor cell. Based on the modified all-fiber reflective Sagnac interferometer, the fiber atomic spin precession detection system is built and the detection of spin precession signals in the spin exchanged relaxation free states is realized by a circularly polarized light. The detection scheme is verified and the gyroscopic effect is realized on the experimental platform of an atomic spin gyroscope. The experimental results confirm that the proposed theory is correct. The performance of this gyroscope is preliminarily tested and its zero-bias instability is 0.29 (°)/h.
杨远洪, 刘琳妮, 陈东营, 杨福铃, 全伟, 房建成. 基于圆偏振探测光的光纤原子自旋进动检测技术[J]. 光学学报, 2019, 39(1): 0112001. Yuanhong Yang, Linni Liu, Dongying Chen, Fuling Yang, Wei Quan, Jiancheng Fang. Detection Method of Fiber Atomic Spin Precession Based on Circularly Polarized Probe Light[J]. Acta Optica Sinica, 2019, 39(1): 0112001.