2×4集成结构90°空间光学桥接器  

2×4 Free-Space 90° Optical Hybrid with Integrated Structure

作　　者：宋哲[1] 于伟行 宋佳 王妍[1] 田小凡 赵趣 王安鸽 Song Zhe;Yu Weihang;Song Jia;Wang Yan;Tian Xiaofan;Zhao Qu;Wang Ange(College of Physics and Electronic Technology,Liaoning Normal University,Dalian,Liaoning 116029,China)

机构地区：[1]辽宁师范大学物理与电子技术学院,辽宁大连116029

出　　处：《激光与光电子学进展》2018年第11期432-437,共6页Laser & Optoelectronics Progress

摘　　要：利用晶体的双折射、双反射现象及电光效应,设计了一种具有集成结构的2×4的90°空间光学桥接器,其由一块电控双折射晶体和一块检偏双折射晶体构成。电控双折射晶体通过4次全内双反射和电光调制实现信号光与本振光的分束和耦合,通过调节电控双折射晶体的控制电压和检偏双折射晶体的双折射效应,输出了4路具有90°相移的信号光与本振光混合光束。该桥接器具有结构简单紧凑、损耗小、性能稳定等优点,适用于空间相干通信系统。Based on the double refraction and double reflection phenomena and on the electro-optic effect of crystals, a 2 × 4 free-space 90° optical hybrid with an integrated structure is designed. This optical hybrid is composed of an electrically controlled birefringence crystal and a birefringenee crystal which is used as an analyzer. With the electrically controlled birefringence crystal, the splitting and coupling between the signal light and the local oscillation light are realized by means of four internal double reflections and the electro-optic modulation. By adjusting the control voltage of the electrically controlled birefringence crystal and the double refraction effect of the analyzer, four-route signal-local mixed lights with a 90° phase shift are obtained. This hybrid exhibits the advantages of simple and compact structure, low loss and stable performance, which is applicable to the spatial coherence communication system.

关 键 词：光学器件 相干光通信 90°光学桥接器 双折射 双反射 电光效应 

分 类 号：TN929.1[电子电信—通信与信息系统]