基于光子晶体和纳米线波导的马赫-曾德尔型调制器
投稿时间:2018-12-23  修订日期:2019-05-28  点此下载全文
引用本文:胡宇宸,陈鹤鸣,周昊天.基于光子晶体和纳米线波导的马赫-曾德尔型调制器[J].红外与毫米波学报,2019,38(4):499~507].HU Yu-Chen,CHEN He-Ming,ZHOU Hao-Tian.Mach-Zehnder modulator based on photonic crystal and nanowire waveguide[J].J.Infrared Millim.Waves,2019,38(4):499~507.]
摘要点击次数: 48
全文下载次数: 50
作者单位E-mail
胡宇宸 南京邮电大学 光电工程学院 hundeduwu@126.com 
陈鹤鸣 南京邮电大学 贝尔英才学院 chhm@njupt.edu.cn 
周昊天 南京邮电大学 光电工程学院  
基金项目:国家自然科学基金 61077084 61571237;江苏省自然科学基金 BK20151509国家自然科学基金(61077084, 61571237),江苏省自然科学基金(BK20151509)
中文摘要:提出了一种基于光子晶体和纳米线波导的马赫-曾德尔型调制器。该调制器由硅基光子晶体平板波导、纳米线波导和光子晶体多模干涉耦合器(MMI)构成。在光子晶体与纳米线波导连接处采用了锥型结构,用于减少模式失配造成的损耗。利用时域有限差分法(3D-FDTD)进行仿真分析,结果表明,该调制器在工作波长1550 nm下的插入损耗为0.3 dB,消光比为15.1 dB,器件尺寸仅,调制带宽可以达到68 GHz,且工作区域覆盖了以1551 nm为中心波长20 nm的通信波段。该调制器结构紧凑,易于集成,可应用于高速光通信系统。
中文关键词:光子晶体  调制器  多模干涉耦合  马赫-曾德尔型
 
Mach-Zehnder modulator based on photonic crystal and nanowire waveguide
Abstract:A Mach-Zehnder modulator based on photonic crystal and nanowire waveguide is proposed. The modulator consists of silicon-based photonic crystal slab waveguides, nanowire waveguides, and two photonic crystal multimode interference couplers (MMI). Designed tapered structures are working at the junction of the photonic crystal and the nanowire waveguide to reduce the loss caused by the mode mismatch. The simulation analysis by time-domain finite difference method (3D-FDTD) shows that the insertion loss and extinction ratio of the modulator with a compact size of only 46μm × 8μm × 0.22μm at the operating wavelength of 1550 nm are 0.3dB,15.1dB,respectively. The operation with a wavelength range of 20 nm are obtained at a center wavelength of 1551 nm.The 3dB bandwidth can reach 68 GHz,which allows high speed optical communication systems.
keywords:photonic crystal  modulator  multimode interference coupling  Mach-Zehnder type
查看全文  HTML  查看/发表评论  下载PDF阅读器

版权所有:《红外与毫米波学报》编辑部