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设计了一种由相位型空间光调制器(PSLM)、偏振光分束器(PBS)、反射镜、半波片(HWP)和四分之一波片(QWP)构成的2×2光开关。该光开关所用器件少,具有结构紧凑规整、功能的实现与信号光的偏振态无关以及可以完成双向交换等特点。在此基础上通过2×2光开关的级联,设计了一种与偏振无关的4×4光开关的实验模块,根据其路由控制表对该实验模块功能的实现进行了分析。为与之作比较,还提出了一种与偏振相关的4×4光开关,该光开关利用对信号光偏振态的控制进行路由选择,以实现所需的交换和排序。
A 2 × 2 optical switch consisting of a PSLM, a PBS, a mirror, a half-wave plate (HWP) and a quarter wave plate (QWP) . The optical switch with less components, with a structured and structured, the realization of the function of the signal light has nothing to do with the polarization state and can be completed bidirectional exchange. Based on this, a 2 × 2 optical switch cascaded was designed to design an experimental module with 4 × 4 polarization-independent optical switch. The realization of this experimental module was analyzed according to its routing control table. In comparison with this, a polarization-dependent 4x4 optical switch is also proposed that uses routing to control the polarization of the signal light to achieve the desired exchange and sequencing.