红外与毫米波学报, 2019, 38 (6): 701, 网络出版: 2019-12-27
基于二氧化硅平面光波导的强度均衡的光脉冲对的产生
Generation of an intensity-balanced optical pulse couple based on silica planar lightwave circuit
非对称MZI干涉仪 热场模拟 量子密钥分发 asymmetric Mach-Zehnder interferometer thermal field simulation quantum key distribution
摘要
提出了一种基于平面光波导工艺的带有可调定向耦合器的非对称MZI结构.模拟结果显示，当定向耦合器的两个耦合臂的折射率独立改变时，定向耦合器的调制效果较好；当调制电极与耦合区的波导间距为0时，两个耦合臂的温度差达到最大.测试得到，AMZI的插入损耗为2.05 dB，延迟时间为151.4 ps，脉冲对的功率比近似为1.该器件有助于提高集成QKD器件的性能.
Abstract
To make the pulse couple balanced, an asymmetric Mach-Zehnder interferometer (AMZI) with a tunable directional coupler (DC) of a silica-based planar lightwave circuit (PLC) technology was proposed. The simulation results show that the DC tuning effect is better when the refractive index of both coupling arms changes independently. When the distance between the electrode and the waveguide core in the coupling zone is 0, the temperature difference between the coupling arms reaches the maximum. The test results of AMZI show that the insertion loss is 2.05 dB and the delay time is 151.4 ps. The power ratio of the pulse couple is highly close to one. Our device presents a practical solution to improve the performance of future integrated QKD device.
任梅珍, 李骁, 张家顺, 王亮亮, 王玥, 尹晓杰, 吴远大, 安俊明. 基于二氧化硅平面光波导的强度均衡的光脉冲对的产生[J]. 红外与毫米波学报, 2019, 38(6): 701. Mei-Zhen REN, Xiao LI, Jia-Shun ZHANG, Liang-Liang WANG, Yue WANG, Xiao-Jie YIN, Yuan-Da WU, Jun-Ming AN. Generation of an intensity-balanced optical pulse couple based on silica planar lightwave circuit[J]. Journal of Infrared and Millimeter Waves, 2019, 38(6): 701.
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