电光有机聚合物多模干涉分束器  

Multimode interference power splitter based on electro-optic organic/polymers

作　　者：王春利[1] 廖进昆[1] 陈韬[1] 

机构地区：[1]电子科技大学光电信息学院,四川成都610054

出　　处：《应用光学》2011年第1期124-127,共4页Journal of Applied Optics

基　　金：国家863计划(2007AA01Z269);总装"十一.五"(2009AA03Z413)

摘　　要：分束器是光纤通信系统中光无源网络和光子集成回路的重要器件。1×2 MMI(multimode interferences)电光有机聚合物分束器是利用自成像效应设计的。分析了1×2 MMI的工作原理。利用有效折射率方法(effective index method,EIM)计算出1×2 MMI三维多模脊形波导的有效折射率分布。利用自成像效应的成像规律计算出成像位置并用导模传输分析法(guided-mode propagation analysis,MPA)对输出波导的光强进行模拟。分析表明:在波长为1.55μm的情况下,1×2 MMI的输出波导的光强在未加电极时可以实现预定分束比输出;加上电极之后,由于电光效应可调控有机聚合物波导折射率的改变,利用有限差分光束传播法模拟输出波导的分束比可在7.6 dB范围内可调。Optical power splitters are essential devices for optical fiber communication system in passive optical networks（PONs） and photonic integrated circuits（PICs）.As one of the optical splitters,1×2 electro-optical multimode interference（EO-MMI） power splitter fabricated by electro-optic organic polymer was analyzed by the self-imaging effect.The operation principle of the 1×2 EO-MMI power splitter was discussed.Firstly,the effective index of the three dimensional（3-D） ridge waveguide was computed by the effective index method（EIM）.Then the positions of the two images were calculated respectively by using the formulas of the self-image effect.The power-splitting ratio in the output waveguides was simulated by the guided mode propagation analysis（MPA）.Research results show that,for the 1×2 EO-MMI power splitter operating at 1.55 microns,the special power-splitter ratio can be obtained if there are no electrodes on the ridge waveguide.Furthermore,when the electrodes are put on the top of the waveguide,the power splitting ratio is realized for a tunable scope of 7.8 dB,for the electro-optical effect to change the refractive index.

关 键 词：电光有机聚合物 分束器 有效折射率法 导模传输分析法 分束比 

分 类 号：TN252[电子电信—物理电子学]