Xiong Junyu, Yin Longfei, Luo Bin, Guo Hong
Opt Express. 2016 Jun 27;24(13):14925-33. doi: 10.1364/OE.24.014925.
In this work, a detailed theoretical analysis of 1529 nm ES-FADOF (excited state Faraday anomalous dispersion optical filter) based on rubidium atoms pumped by 780 nm laser is introduced, where Zeeman splitting, Doppler broadening, and relaxation processes are considered. Experimental results are carefully compared with the derivation. The results prove that the optimal pumping frequency is affected by the working magnetic field. The population distribution among all hyperfine Zeeman sublevels under the optimal pumping frequency has also been obtained, which shows that Rb atoms are the main contribution to the population. The peak transmittance above 90% is obtained, which is in accordance with the experiment. The calculation also shows that the asymmetric spectra observed in the experiment are caused by the unbalanced population distribution among Zeeman sublevels. This theoretical model can be used for all kinds of calculations for FADOF.
在这项工作中，介绍了基于780nm激光泵浦铷原子的1529nm受激态法拉第反常色散光学滤波器（ES-FADOF）的详细理论分析，其中考虑了塞曼分裂、多普勒展宽和弛豫过程。实验结果与推导结果进行了仔细比较。结果证明，最佳泵浦频率受工作磁场影响。还获得了最佳泵浦频率下所有超精细塞曼子能级间的粒子数分布，结果表明铷原子对粒子数的贡献最大。获得了高于90%的峰值透过率，这与实验结果相符。计算还表明，实验中观察到的不对称光谱是由塞曼子能级间粒子数分布不平衡引起的。该理论模型可用于FADOF的各种计算。
