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设计了一种基于crossbar电光开关网络的偏振结构广义无阻塞自由空间全光路由器,利用电光晶体开关作为入射光束的偏振控制器,偏振分束棱镜作为分束元件,提出自由空间2×2和3×3全光路由器的基本结构,能够实现自由空间2×2和3×3全光路由器的任意通道的广义无阻塞连接,并可以实现N×N全光路由器的拓展。这种自由空间全光路由器具有结构简单、插入损耗低、响应速度快、无阻塞等优点,可以实现实时可编程控制,适用于空天全光路由组网。对自由空间2×2全光路由器进行了实验验证,实现了2×2光互连,消光比达到27dB,最大插入损耗约为0.73dB。
A generalized non-blocking free-space all-optical router with polarization structure based on crossbar electro-optical switch network is designed. The polarization controller is controlled by the electro-optic crystal switch as the incident beam. The polarization beam splitter prism is used as the beam splitting element. The free space 2 × 2 and 3 × 3 All-optical router’s basic structure enables free-space 2 × 2 and 3 × 3 all-optical routers, any channel of generalized non-blocking connection, and can achieve N × N all-optical router expansion. This free-space all-optical router has the advantages of simple structure, low insertion loss, fast response, non-blocking and the like, and real-time programmable control is applicable to all optical routing networks. The 2 × 2 all-optical router in free space is verified by experiments, and 2 × 2 optical interconnects are realized. The extinction ratio reaches 27dB and the maximum insertion loss is about 0.73dB.