离散谱折射率法优化设计MMI型光功分器  

Optimization of MMI Optical Power Splitter Using Discrete Spectral Index Method

作　　者：马慧莲[1] 王明华[1] 

机构地区：[1]浙江大学信息与电子工程学系,浙江杭州310027

出　　处：《光电子．激光》2004年第9期1042-1045,1049,共5页Journal of Optoelectronics·Laser

基　　金：国家重点基础研究发展规划资助项目(G1999033110);浙江省教育厅科研资助项目(20020723)

摘　　要：采用离散谱折射率法直接对三维脊形自镜像效应(SIE)多模波导的模式特性进行具体分析,并根据模式传播常数偏差分布情况,引入了SIE多模波导长度微小变量用以抵消或部分减弱由各阶模式传播常数偏差引起的相位偏差,设计了一种低自镜像损耗、高均匀度、几乎与偏振无关及深刻蚀SIE多模波导结构的多模干涉(MMI)光功分器。如1×16MMI光功分器TE模的自镜像损耗为0.0451dB,均匀度0.0309dB;对TE模的自镜像损耗为0.0455dB,均匀度为0.0311dB。A detailed analysis of mode characteristics in self-image effect (SIE) multimode rib waveguide was presented by using discrete spectral index method. According distribution of mode propagation deviation, it can be introduced some small length increment of the SIE multimode waveguide to compensate phase error from mode propagation. Using above procedures, We designed a low self-imaging loss, high uniformity, and polarization-insensitive multimode interference (MMI) optical power splitters with deep-etched SIE multimode waveguide structure. The results show that for 1×16 MMI optical power splitter, the self-imaging loss and uniformity are 0.0451 dB and 0.0309 dB for TE mode operation, and 0.0455 dB and 0.0311 dB for TM mode operation respectively.

关 键 词：光功分器 多模波导 传播常数 MMI 离散谱 偏振无关 TE模 折射率 差分 镜像 

分 类 号：TN252[电子电信—物理电子学] TN256