用衍射相位元件分离并聚焦偏振光

Polarization Demultiplexing and Spatial Focusing with Diffractive Phase Element

通过相位恢复的原理， 设计了在平行光的照明下单轴双折射晶体做成的衍射相位元件以实现分离并聚焦ｏ 偏振光和ｅ 偏振光。讨论了相位量化对结果的影响。理论计算表明： 这种方法可成功地实现偏振光的分离和聚焦。

The design of diffractive phase elements (DPE′s) with polarization selectivity is presented, which can realize polarization demultiplexing and spatial focusing simultaneously. The design scheme is based on the general theory of amplitude phase retrieval and Y G iterative algorithm. A set of equations for determining the modulation depth distribution of the surface relief DPE is derived. Two model designs are carried out. The numerical simulations show that this suggested approach can achieve successfully the design of desired pattern.