铷原子法拉第共振滤光特性研究

Study of Rb Faraday Resonance Optical Filter

我们在不同磁场强度、原子气体密度下，实验观测了７８０ｎｍ铷原子气体的法拉第共振滤光效应，并进行了理论分析。结果表明：透射峰中心频率的调谐能力为～１００ＧＨｚ／Ｔ，透过率大于４０％，通频带宽为０．００１ｎｍ～０．０１ｎｍ，背景光抑制本领优于１０￣（－４）。

The transimission of 780nm Rb Faraday resonance optical filter(Rb-FROF) is measured experimentally and analysed theoretically as a function of the density of atoms and the intensity of magnetic field.The experimental results show that the tuning capability of Rb-FROF by changing the magnetic field is about 100GHz/T,the coefficient of transmission more than 40%,the bandwidth 0. 001nm￣0. 01nm,and the rejection better than 10￣(-4).