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利用成熟的偏振控制技术,设计了一种由偏振光分束器、相位型空间光调制器和反射镜构成的2×2光开关,该光开关所用器件少,具有结构简单紧凑、控制灵活方便、功能实现与信号光的偏振态无关以及可以双向交换等特点;在此基础上通过2×2光开关的串连,设计了一种与偏振无关的双向4×4光开关的实验模块,根据其路由选择与控制方法,得到了4×4光开关实现信号光全排列无阻塞输出与交换对应的路由状态表,并对该实验模块的功能实现进行了详细的分析与讨论。
Using the sophisticated polarization control technology, a 2 × 2 optical switch composed of a polarized beam splitter, a phase type spatial light modulator and a reflecting mirror is designed. The optical switch has fewer components, has the advantages of simple and compact structure, flexible control , The realization of the function has nothing to do with the polarization state of the signal light and can be exchanged bidirectionally and so on. On the basis of this, an experimental module of polarization-independent bi-directional 4 × 4 optical switch is designed through the series connection of 2 × 2 optical switches. The routing and control method of the 4 × 4 optical switch is used to realize the routing state table corresponding to the non-blocking output and exchange of the signal light, and the detailed analysis and discussion of the function of the experimental module are given.