基于SOI的类梅花型二维光栅耦合器  

Plum-like two-dimensional grating coupler based on SOI

作　　者：冯瑶 耿敏明[1,2,3,4] 何万才 赖明彬 刘嫱 张振荣 FENG Yao;GENG Minming;HE Wancai;LAI Mingbing;LIU Qiang;ZHANG Zhenrong(School of Computer,Electronics and Information,Guangxi University,Nanning 530004,China;Guangxi Key Laboratory of Multimedia Communications and Network Technology,Nanning 530004,China;Key Laboratory of Multimedia Communications and Information Processing of Guangxi Higher Education Institutes,Nanning 530004,China;Guangxi Experiment Center of Information Science,Guilin Guangxi 541004,China)

机构地区：[1]广西大学计算机与电子信息学院,南宁530004 [2]广西多媒体通信与网络技术重点实验室,南宁530004 [3]广西高校多媒体通信与信息处理重点实验室,南宁530004 [4]广西信息科学实验中心,广西桂林541004

出　　处：《光通信技术》2023年第4期1-7,共7页Optical Communication Technology

基　　金：国家自然科学基金项目(61741504、61965003、61661004)资助;广西自然基金项目(2018GXNSFAA294133)资助。

摘　　要：为设计出高效率且低偏振耦合相关损耗的二维光栅耦合器(2D-GC),提出一种基于绝缘体上硅(SOI)的类梅花型2D-GC。该2D-GC由多个单元周期排列而成,每个单元的图案呈类梅花型,该结构中的晶胞由2对圆形图案构成,并采用时域有限差分(FDTD)法对2D-GC结构参数进行数值仿真优化。仿真结果表明:在最佳优化参数结构时,所提2D-GC的有效工作波段为1.525~1.6μm,最佳耦合效率为56%,对应的耦合损耗为-2.4 dB,偏振相关损耗为0.18 dB。In order to design a two-dimensional grating coupler(2D-GC)with high efficiency and low polarization coupling related loss,a plum-like 2D-GC based on silicon-on-insulator(SOI)is proposed.The 2D-GC is composed of several cells arranged periodically,and the pattern of each cell is like plum blossom.The cell in the structure is composed of two pairs of circular patterns.The finite difference time domain(FDTD)method is used to simulate and optimize the structure parameters of the 2D-GC.The simulation results show that the effective working band of the proposed 2D-GC is 1.525~1.6μm,the optimal coupling efficiency is 56%,the corresponding coupling loss is-2.4 dB,and the polarization related loss is 0.18 dB when the parameter structure is optimized.

关 键 词：绝缘体上硅 二维光栅耦合器 类梅花型 偏振 耦合损耗 

分 类 号：TN252[电子电信—物理电子学]