Wu Y, Liu L, Wang Z
Appl Opt. 1994 Jan 10;33(2):175-8. doi: 10.1364/AO.33.000175.
An optical crossbar element that uses birefringent crystal plates and programmable half-wave plates is proposed. It is compact, cascadable, and well suited for realizing an array of switching elements employed in multistage interconnection networks. Arrays of two-input/two-output and four-input/fourputput crossbar switching elements and a Clos (4, 4, 4) network are also presented.
提出了一种使用双折射晶体板和可编程半波片的光学交叉开关元件。它结构紧凑，可级联，非常适合用于实现多级互连网络中使用的开关元件阵列。还展示了两输入/两输出和四输入/四输出交叉开关元件阵列以及一个Clos(4,4,4)网络。
