扩展BANYAN网络的可重构 无阻塞8×8矩阵光开关

在分析CROSSBAR网络(CN)和BANYAN网络(BN)结构的基础上,提出了一种新的扩展BANYAN网络(EBN)可重构无阻塞结构。以8×8矩阵光开关为例,分析了EBN结构的两种形式及其可重构无阻塞特性,给出了开关单元驱动逻辑。从理论上计算了SiO₂波导EBN结构矩阵光开关的光学损耗和功耗。对于8×8开关,插入损耗为3.3 dB。按理论计算设计制作了8×8矩阵光开关,测得波导传输损耗为0.1 dB/cm,光纤-波导耦合损耗为0.5 dB/point。光开关插入损耗为4.6 dB,平均串扰为-38 dB,平均偏振相关损耗为0.4 dB,开关平均功率为1.6 W,响应时间约为1 ms。实验结果与理论计算基本符合。

Rearrangeable nonblocking 8×8 optical matrix switch with extended BANYAN network

Based on the construction of the CROSSBAR network(CN) and the BANYAN network(BN), a new rearrangeable nonblocking construction called extended BANYAN network (EBN) was proposed. Taking the 8×8 optical matrix switch for example, two types of EBN construction and their rearrangeable nonblocking characteristics were studied, and the drive logic of switching units was provided. A SiO₂ waveguide 8×8 optical matrix switch was designed and fabricated according to the calculated insertion loss of 3.3 dB for 8×8 optical matrix swith. The SiO₂ waveguide propagation loss of 0.1 dB/cm and fiber-waveguide coupling loss of 0.5 dB/point were measured out. With the fabricated 8×8 optical matrix switch, optical insertion loss of 4.6 dB, average cross-talk of -38 dB, average polarization dependent loss of 0.4 dB, averaged switching power of 1.6 W, and response time of 1 ms were achieved. The experiment results are concident with theoretical calculation well.