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基于光开关在全光通信和光互连网络中的重要作用,设计了由偏振光分束器(PBS)、相位型空间光调制器(PSLM)和反射镜构成的1×N和N×1光开关模块,其中N=2m,m=1,2,3…。该设计利用PSLM对信号光偏振态的控制,在自由空间实现信号的路由和切换,信号光的P光分量和S光分量同时参与工作,并在输出端口重新会合,因此光开关表现出与信号光偏振态无关的特点。同时,该光开关所用器件少,具有结构简单紧凑、控制方便灵活和操作迅速快捷等特点,而且具有很强的重构与升级能力,对于构建大规模的交换矩阵具有一定的作用。
Based on the important role of optical switches in all-optical communications and optical interconnection networks, 1 × N and N × 1 light beams consisting of PBS, PSLM and mirror are designed. Switch module, where N = 2m, m = 1, 2, 3 .... This design uses PSLM to control the polarization state of the signal light, and realizes signal routing and switching in free space. The P light component and the S light component of the signal light are involved in the work at the same time and re-meet at the output port. Therefore, Light polarization has nothing to do with the characteristics. At the same time, the optical switch has few components, has the advantages of simple and compact structure, convenient and flexible control, quick and quick operation, and strong reconstruction and upgrade capability, and plays a certain role in building a large-scale switch matrix.