摘要
首先,对无阻塞的Clos(2,4,2)光网络的拓扑结构和光学实现进行了理论分析;其次,利用偏振光分束器(PBS)、相位型空间光调制器(PSLM)和反射镜设计1×2、2×2和2×4光开关。进而设计无阻塞的Clos(2,4,2)光网络,并讨论了n×m型光开光的设计原则和升级能力。最后,通过实验测试,光开关的串扰最低可以达到-24.0dB,插入损耗最低为0.54dB。理论分析和实验表明,该光开关所用器件少,具有结构简单紧凑、控制灵活方便和功能实现与信号光的偏振态无关等特点。
Firstly,the structure and optical realization of non-blocking Clos(2,4,2) optical network are discussed in detail. Secondly, novel 1 × 2,2 × 2 and 2×4 optical switched are proposed with conventional polarization controlling technology by using phase spatial-light modulator(PSLM), polarized beam split- ter(PBS) and reflective mirror,which will be used to realize the non-blocking Clos(2,4,2)optical net- work. Simultaneously, the upgrading capacity of n × m optical switch is also discussed. Finally, according to the experimental results, the minimal inter-channel crosstalk and the insertion loss are respectively -- 24.0 dB and 0.54 dB. The novel optical switches have the features of fewer optical components, compact structure, efficient performance, convenient control and function insensitive polarization of signal beam.
出处
《光电子.激光》
EI
CAS
CSCD
北大核心
2011年第10期1483-1487,共5页
Journal of Optoelectronics·Laser
基金
国家自然科学基金资助项目(60673147
60907003
61070040)
国防科技大学校预研基金资助项目(JC09-02-12)
博士后基金资助项目(20100480116)