光子晶体电光调制和粗波分复用集成器件研究  

An Integrated Device for Photonic-Crystal Electro-Optic Modulation and Coarse Wavelength-Division Multiplexing

作　　者：刘雪[1] 陈鹤鸣 胡宇宸 Liu Xue;Chen Heming;Hu Yuchen(College of Electronic and Optical Engineering&College of Microelectronics,Nanjing University of Posts and Telecommunications,Nanjing,Jiangsu 210023,China;Bell Honors School,Nanjing University of Posts and Telecommunications,Nanjing,Jiangsu 210023,China)

机构地区：[1]南京邮电大学电子与光学工程学院,微电子学院,江苏南京210023 [2]南京邮电大学贝尔英才学院,江苏南京210023

出　　处：《中国激光》2021年第3期55-64,共10页Chinese Journal of Lasers

基　　金：国家自然科学基金(61571237);江苏省自然科学基金(BK20151509)。

摘　　要：提出了一种用于电光调制和粗波分复用的片上集成器件。该集成器件的电光调制器模块和粗波分复用器模块都是由硅基光子晶体波导和L3型谐振腔组成,两个模块间采用硅基光子晶体波导连接。该器件根据等离子体色散效应,采用L3型谐振腔和PN结实现了对波长的调制;根据微腔与波导的直接耦合理论,采用L3型谐振腔结构实现了滤波。利用基于三维时域有限差分法(3D-FDTD)的Lumerical软件对其进行仿真分析,结果表明该集成器件在工作波长1530 nm和1550 nm下均可以先完成各自的电光调制再进行双通道波长的复用。该器件在工作波长1530 nm和1550 nm下的插入损耗分别为0.70 dB和0.95 dB,消光比分别为20.97 dB和22.05 dB,调制深度均为0.99,信道串扰分别为-29.05 dB和-27.59 dB,器件尺寸仅为17.83μm×17.3μm×0.22μm。该集成器件结构紧凑,易于集成,可应用于高速大容量波分复用光通信系统。Objective With the advent of 5 G communication,the demands for communication systems with increased capacity and speed are growing rapidly.Unit-device technology has basically matured,and the only way to break through the bottleneck of information systems to achieve high-speed,low power consumption,and small size is to use siliconbased optoelectronic integration.Various structures have been proposed for electro-optical modulators and wavelength-division multiplexers,and research on these two types of individual devices has become increasingly mature.However,there have been few studies which integrate the two devices in a single device to achieve multiple functions.Because silicon-based optoelectronic integration has the characteristics of low packaging cost,small size,and high integration,we propose here an on-chip integrated device for electro-optic modulation and coarse wavelength-division multiplexing.Integrating these two functions on the same silicon-based photonic-crystal plate yields a device with the desirable characteristics of small size,low insertion loss,small modulation voltage,large modulation depth,and low channel crosstalk.We therefore anticipate that this integrated-device study will be helpful for the rapid development of information technology in the near future.Methods The integrated device described in this paper consists of two modules,a photonic-crystal electro-optic modulator and a coarse wavelength-division multiplexer.The integrated device is a photonic crystal with a heterogeneous structure,which achieves "on" and "off" state modulation of different wavelengths in the electrooptical modulation module,and the download function for the different wavelengths is provided by the coarse wavelength-division multiplexing module.This article is based on a simulation analysis using the FDTD and DEVICE modules in the commercial optical-simulation software Lumerical.First,an L3 resonant cavity and PN junction employ plasma dispersion to modulate the wavelength of the input signal.Then,using direct

关 键 词：光通信 粗波分复用 电光调制器 L3型谐振腔 光子晶体 

分 类 号：TN256[电子电信—物理电子学]