Faraday-Faraday和Faraday-Voigt几何中具有级联蒸汽单元的更好的磁光滤波器
Better magneto-optical filters with cascaded vapor cells in the Faraday-Faraday and Faraday-Voigt geometries
摘要：
单单元磁光法拉第滤波器具有很大的实用性，并且可以用“翼”或“线中心”光谱轮廓来实现。我们表明，级联的第二个细胞与独立的轴向（法拉第）或横向（福格特）磁场导致改善性能的品质因数（FOM）和光谱轮廓。第一单元光学地旋转光的偏振平面，从而产生高透射窗口;第二单元选择性地吸收光，从而消除不需要的透射。利用天然丰富的Rb蒸气室，我们实现了法拉第-法拉第翼滤波器和第一个记录的法拉第-Voigt线中心滤波器，表现出良好的协议与理论。这两个滤波器的FOM值分别为0.86和1.63 GHz的$^{-1}$，其中后者是最大的FOM原子线滤波器记录。
英文摘要：
Single-cell magneto-optical Faraday filters find great utility and are realized with either 'wing' or 'line center' spectral profiles. We show that cascading a second cell with independent axial (Faraday) or transverse (Voigt) magnetic field leads to improved performance in terms of figure of merit (FOM) and spectral profile. The first cell optically rotates the plane of polarization of light creating the high transmission window; the second cell selectively absorbs the light eliminating unwanted transmission. Using naturally-abundant Rb vapor cells, we realize a Faraday-Faraday wing filter and the first recorded Faraday-Voigt line center filter which show excellent agreement with theory. The two filters have FOM values of 0.86 and 1.63 GHz$^{-1}$ respectively, the latter of which is the largest FOM atomic line filter recorded.
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