基于相变材料的可重构模式复用光波导开关  

Reconfigurable Mode Multiplexer Waveguide Switch Based on Phase Change Material

作　　者：吕元帅 汪成根 袁伟 张桂菊[1,2] 齐开悦 Lü Yuanshuai;Wang Chenggen;Yuan Wei;Zhang Guiju;Qi Kaiyue(School of Optoelectronic Science and Engineering,Soochow University,Suzhou,Jiangsu 215006,China;Key Lab of Advanced Optical Manufacture Technologies of Jiangsu Province&Key Lab of Modern Optical Technologies of Education Ministry of China,Suzhou,Jiangsu 215006,China;School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]苏州大学光电科学与工程学院,江苏苏州215006 [2]江苏省先进光学制造技术重点实验室与教育部现代光学技术重点实验室,江苏苏州215006 [3]上海交通大学电子信息与电气工程学院,上海200240

出　　处：《光学学报》2021年第17期116-126,共11页Acta Optica Sinica

基　　金：苏州大学校级横向科研合作项目(P110800320)。

摘　　要：基于光学相变材料Ge2Sb2Se4Te1和光波导结构,提出一种可重构的2×4模式复用光开关器件,用来提高光通信容量。该器件由两个含倾斜波导结构的1×2复用开关单元和一个结构对称的2×2复用开关单元构成。首先通过模式耦合理论分析波导中的模式传输特性,然后采用三维时域有限差分法对光开关器件进行建模,最后使用模型进行实验研究。研究结果表明,当工作波长为1550 nm时,1×2开关单元在相变材料为晶态和非晶态下的插入损耗分别低至0.60 dB和0.06 dB,消光比分别高达19.55 dB和27.58 dB;2×4模式复用开关在整个C波段(1530~1565 nm)插入损耗的最小值为0.23 dB,消光比的最大值为19.12 dB。Based on the optical phase change material Ge2Sb2Se4Te1 and the optical waveguide structure,a reconfigurable 2×4 mode multiplexing optical switch device is proposed to improve the optical communication capacity.The device is composed of two 1×2 multiplexing switch units with a slanted waveguide structure and a 2×2 multiplexing switch unit with symmetrical structure.First,the mode transmission characteristics in the waveguide are analyzed by the mode coupling theory.Second,the optical switching device is modeled by the three-dimensional finite difference time domain method.Finally,the model is used for experimental research.The research results show that when the working wavelength is 1550 nm,the insertion loss of the 1×2 switch unit when the phase change material is in the crystalline state and the amorphous state is as low as 0.60 dB and 0.06 dB,and the extinction ratio is as high as 19.55 dB and 27.58 dB,respectively.The minimum insertion loss of the 2×4 mode multiplex switch in the entire C-band(1530--1565 nm)is 0.23 dB,and the maximum extinction ratio is 19.12 dB.

关 键 词：光学器件 光波导开关 相变材料 模分复用 光通信 

分 类 号：TN25[电子电信—物理电子学]