基于纳米线波导和一维光子晶体纳米梁腔的模分-波分混合解复用器  

Hybrid Demultiplexer for Mode-Wavelength Division Based on Nanowire Waveguides and One-Dimensional Photonic Crystal Nanobeam Cavity

作　　者：潘万乐 陈鹤鸣 庄煜阳 胡宇宸 Pan Wanle;Chen Heming;Zhuang Yuyang;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：《光学学报》2021年第4期131-140,共10页Acta Optica Sinica

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

摘　　要：设计了一种基于纳米线波导和一维光子晶体纳米梁腔的模分-波分混合解复用器,该器件由波分解复用(WDM)和模分解复用(MDM)两部分组成。其中,波分解复用部分由两个一维光子晶体纳米梁腔构成,模分解复用部分采用硅基纳米线波导结构。利用三维时域有限差分法,计算分析了该混合解复用器的性能参数。结果表明,该器件可以在波长1570.0 nm和1573.2 nm处实现基模(TE_(0))和一阶模(TE_(1))四个信道的解复用功能,插入损耗小于0.37 dB,信道串扰小于-18.4 dB,自由光谱范围可以达到400 nm。该混合解复用器可以应用于模分-粗波分复用系统中。A hybrid demultiplexer for mode-wavelength division based on nanowire waveguides and one-dimensional photonic crystal nanobeam cavity is proposed.The device consists of a wavelength division multiplexer(WDM)and a mode division multiplexer(MDM),in which the WDM is composed of two one-dimensional photonic crystal nanobeam cavities,however the MDM adopts a silicon-based nanowire waveguide structure.The parameters of the hybrid demultiplexer are calculated using the three-dimensional finite-difference time-domain(3 D-FDTD)method.The results show that the four channels of the fundamental mode(TE_(0))and the first-order mode(TE1)at wavelengths of 1570.0 nm and 1573.2 nm can be demultiplexed by this device.The insertion loss and the channel crosstalk are smaller than 0.37 dB and-18.4 dB,respectively.The free spectral range can reach 400 nm.The proposed hybrid demultiplexer can be applied to a mode-division and coarse-wavelength-division multiplexing system.

关 键 词：集成光学 光子晶体 纳米梁腔 纳米线波导 时域有限差分法 混合解复用器 

分 类 号：O43[机械工程—光学工程]