光学学报, 2007, 27 (9): 1593, 网络出版: 2007-10-17   

与偏振无关双向2×2和4×4自由空间光开关

Polarization-Independent Bidirectional 2×2 and 4×4 Free-Space Optical Switch
作者单位
四川大学电子信息学院光电科学技术系, 成都 610064
摘要
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。
Abstract
A novel 2×2 optical switch is proposed with conventional polarization controlling technology by using phase spatial-light modulator (PSLM), polarized beam splitter (PBS) and mirror. This new kind optical switch grants the features of less optical components, compact structure, efficient performance, convenient control and function insensitive to polarization of signal beam. In addition, the straight and the exchange functions of 2×2 optical switch are implemented bidirectionally in free-space. Furthermore, a new optical experimental module of 4×4 optical switch is presented by cascading polarization-independent bidirectional 2×2 optical switch. Moreover, the routing state table of 4×4 optical switch to perform all-permutation output and nonblocking switch for the input signal beams, is achieved by choosing and controlling routing. Finally, the function properties and operational process of 4×4 optical switch are discussed in detail.
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杨俊波, 苏显渝. 与偏振无关双向2×2和4×4自由空间光开关[J]. 光学学报, 2007, 27(9): 1593. 杨俊波, 苏显渝. Polarization-Independent Bidirectional 2×2 and 4×4 Free-Space Optical Switch[J]. Acta Optica Sinica, 2007, 27(9): 1593.

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