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27 dB，最大插入损耗约为0.73 dB。

A generalized non-blocking free-space all-optical router with polarization structure based on the crossbar switch network is designed. Electro-optic switch is used as the beam polarization controller and the polarization beam splitter is used as beam-separating element. Basic structures of the 2×2 and 3×3 all-optical routers are proposed. They can achieve generalized non-blocking connection between any two channels in free-space and realize the extension of the N×N all-optical router. The novel free-space all-optical router is simple and reliable. It has the advantages of fast response, non-blocking, and high speed. It is easy to realize the programmable logic controller (PLC) control function. It is suitable for air-space all-optical routing network. The experimental verification of the free-space 2×2 all-optical router is implemented and 2×2 optical interconnection is realized. The extinction ratio is 27 dB and the maximum insertion loss is 0.73 dB.