应用光学, 2015, 36 (3): 415, 网络出版: 2015-09-08
双光束抽运对全光Cs原子磁力仪灵敏度的影响
Influence of double-pump light on sensitivity of all optical Cs atomic magnetometer
双光束抽运 原子磁力仪 抽运光频率 原子气室 速率方程 two pump beams atomic magnetometer pump light frequency atomic vapor cell rate equation
摘要
原子磁力仪的灵敏度直接取决于抽运光对原子的极化率.分析了Cs原子气室中充入13 332.2 Pa He缓冲气体,两束抽运光频率分别锁定在Cs原子D1线F=4→F′=3和F=3→F′=4共振跃迁线时,基态和激发态各磁子能级上粒子数变化的动力学过程,发现在抽运光的持续作用下Cs原子基态F=3和F=4各磁子能级上的粒子被完全抽运至|F=4,mF=4>态,Cs原子极化率达到最大值.同时,实验结果证明双光束抽运有效提高了磁力仪响应特性曲线的信噪比,从而使原子磁力仪的灵敏度提高了34%.
Abstract
Atomic polarizability can influence the sensitivity of atomic magnetometer.As the buffer gas of Cs vapor cell was about 13 332.2 Pa,the two pump light frequencies were locked toF=4→F′=3 and F=3→F′=4 of Cs D1 transition respectively,the population dynamics of the magnetic sublevels of ground states and excited states were calculated.We find that with the sustained action of pump light ,the population of F=3 and F=4 are pumping to |F=4,mF=4>,and the polarizability reaches maximum value.At the same time the signal-noise ratio of experimental result increases effectively by using two pump beams,then the sensitivity of atomic magnetometer increases by 34%.
刘强, 张晓雨, 刘超, 付天舒, 刘东明, 孙鉴, 夏长超. 双光束抽运对全光Cs原子磁力仪灵敏度的影响[J]. 应用光学, 2015, 36(3): 415. Liu Qiang, Zhang Xiaoyu, Liu Chao, Fu Tianshu, Liu Dongming, Sun Jian, Xia Changchao. Influence of double-pump light on sensitivity of all optical Cs atomic magnetometer[J]. Journal of Applied Optics, 2015, 36(3): 415.
PDF全文
