Design and optimization of the RGB beam combiner in micro display using entropy weight-TOPSIS method  

采用熵权-TOPSIS法设计与优化微型显示中的RGB光束合束器

作　　者：ZHENG Yu ZHAO Yan-bing ZOU Xin-jie WANG Ji-rong JIANG Xiang LIU Jian-zhe DUAN Ji-an 郑煜;赵艳兵;邹欣洁;王继荣;江翔;刘建哲;段吉安

机构地区：[1]State Key Laboratory of Precision Manufacturing for Extreme Service Performance,Central South University,Changsha 410083,China [2]Huangshan Bright Semiconductor Co.,Ltd,Huangshan 245021,China

出　　处：《Journal of Central South University》2025年第2期483-494,共12页中南大学学报(英文版)

基　　金：Project(52175445)supported by the National Natural Science Foundation of China;Project(2022JJ30743)supported by the Natural Science Foundation of Hunan Province,China;Project(2023GK2024)supported by the Key Research and Development Program of Hunan Province,China;Project(2023ZZTS0391)supported by the Fundamental Research Funds for the Central Universities of China。

摘　　要：Red-green-blue(RGB)beam combiners are widely used in scenarios such as augmented reality/virtual reality(AR/VR),laser projection,biochemical detection,and other fields.Optical waveguide combiners have attracted extensive attention due to their advantages of small size,high multiplexing efficiency,convenient mass production,and low cost.An RGB beam combiner based on directional couplers is designed,with a core-cladding relative refractive index difference of 0.75%.The RGB beam combiner is optimized from the perspective of parameter optimization.Using the beam propagation method(BPM),the relationship between the performance of the RGB beam combiner and individual parameters is studied,achieving preliminary optimization of the device’s performance.The key parameters of the RGB beam combiner are optimized using the entropy weight-technique for order preference by similarity to an ideal solution TOPSIS method,establishing the optimal parameter scheme and further improving the device’s performance indicators.The results show that after optimization,the multiplexing efficiencies for red,green,and blue lights,as well as the average multiplexing efficiency,reached 99.17%,99.76%,96.63%and 98.52%,respectively.The size of the RGB beam combiner is 4.768 mm×0.062 mm.RGB(红-绿-蓝)光束合束器广泛应用于增强现实/虚拟现实(AR/VR)、激光投影、生化检测等领域。光波导合束器凭借其小尺寸、高复用效率、易于批量生产和低成本的优点受到了广泛关注。本文设计了一种基于定向耦合器的RGB光束合束器,波导芯层与包层的相对折射率差为0.75%,并从参数优化的角度对器件的性能进行了优化。采用光束传播法(BPM)研究了RGB光束合束器的性能与各个参数之间的关系,并完成了对器件性能的初步优化。采用熵权-TOPSIS法对RGB光束合束器的关键参数进行了优化,确定了最佳参数方案,进一步提高了器件的性能指标。结果表明,经过优化后的红光、绿光和蓝光的复用效率以及平均复用效率分别达到了99.17%、99.76%、96.63%和98.52%。RGB光束合束器的尺寸为4.768 mm×0.062 mm。

关 键 词：optical waveguide combiners red-green-blue beam combiner beam propagation method entropy weight TOPSIS method multiplexing efficiency 

分 类 号：TN256[电子电信—物理电子学]