Ultra-compact, broadband tunable optical bandstop filters based on a multimode one-dimensional photonic crystal waveguide
Ultra-compact, broadband tunable optical bandstop filters based on a multimode one-dimensional photonic crystal waveguide
复制标题
基于多模一维光子晶体波导的超紧凑宽带可调谐光学带阻滤波器
DOI：
10.1364/oe.24.020542
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发表时间：
2016-09-05
期刊：
影响因子：
3.8
通讯作者：
Xia, Jinsong
中科院分区：
文献类型：
--
作者：
Huang, Qingzhong;Jie, Kun;Xia, Jinsong
本文提出并系统研究了基于多模一维光子晶体波导的超小型宽带可调谐光学带阻滤波器。对于微阻带中的波长，输入模式通过PhCW耦合到反向传播的高阶模式，然后以锥形辐射，从而在输出处产生阻带，在输入处具有低背反射。采用三维时域有限差分法研究了超宽带光纤的传输特性。分析了主要结构参数的影响，并对设计进行了优化，以减小背反射和频带旁瓣。利用局部加热，我们可以通过级联所提出的结构来移动阻带和连续调谐带宽。由于强大的光栅强度，我们的设备提供了一个更紧凑的足迹（40 μ m × 1 μ m）和更宽的阻带（带宽高达84 nm）相比，基于微环，长周期波导光栅，多模二维PhCW的同行。(C)2016美国光学学会
In this paper, ultra-compact, broadband tunable optical bandstop filters (OBSFs) based on a multimode one-dimensional photonic crystal waveguide (PhCW) are proposed and systematically investigated. For the wavelengths in the mini-stopband, the input mode is coupled to a contra-propagating higher order mode by the PhCW and then radiates in a taper, resulting in a stopband at the output with low backreflection at the input. Three-dimensional finite-difference time-domain method is employed to study the OBSFs. The influence of main structural parameters is analyzed, and the design is optimized to reduce the back-reflection and band sidelobes. Using localized heating, we can shift the stopband and tune the bandwidth continuously by cascading the proposed structures. Due to the strong grating strength, our device provides a more compact footprint (40 mu m x 1 mu m) and much broader stopband (bandwidth of up to 84 nm), compared to the counterparts based on microrings, long-period waveguide gratings, and multimode two-dimensional PhCWs. (C) 2016 Optical Society of America