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鉴于榕树网在自由空间光子交换网络中具有重要的应用价值,分析了榕树网的特点和4×4二维榕树网的空间拓扑结构,通过偏振光分光棱镜、微闪耀光栅阵列、平面反射镜、半反半透镜和液晶空间光调制器的集成,构建二维的榕树交换网实验模块,利用微闪耀光栅的衍射特性,控制每块微闪耀光栅的周期,以实现入射光信号不同方向的闪耀输出,最终完成二维榕树网自由空间水平和竖直方向上的交叉互连,直通则由平面镜反射实现。对二维榕树网实验模块的功能分析表明,该实验模块理论上可以完成4×4二维面阵内光信号(或数据)的排序、交换、组播、广播、矩阵变换等操作,具有交换透明、速度快、空间带宽高等特点,在全光交换和光通信中具有一定的应用。
In view of the important application value of banyan network in free space photon exchange network, the characteristics of banyan network and the spatial topology of 4 × 4 two-dimensional banyan network are analyzed. By using polarization beam splitting prism, micro-blaze grating array, plane mirror, Semi-anti-semi-transmissive lens and liquid crystal spatial light modulator to build a two-dimensional Banyan exchange network experimental module, the use of micro-blazed grating diffraction characteristics, control each micro-blazed grating period in order to achieve different directions of the incident light signal shine output , Finally completing the cross-interconnection in the free space level and the vertical direction of the two-dimensional banyan tree net, and the straight through is realized by the plane mirror reflection. The functional analysis of the two-dimensional banyan tree experimental module shows that the experimental module can theoretically complete the sorting, exchanging, multicasting, broadcasting, matrix transformation and other operations of optical signals (or data) in a 4 × 4 two- Transparent, fast, high bandwidth and other characteristics, all-optical switching and optical communications has a certain application.