超微光子晶体多模干涉型滤波器的设计与优化  

Design and Optimization of Ultracompact Multimode Interference-based Photonic Crystal Filter

作　　者：谈振兴[1] 于天宝[1] 方利广[1] 陈淑文[1] 廖清华[1] 

机构地区：[1]南昌大学理学院,南昌330047

出　　处：《光子学报》2009年第3期592-596,共5页Acta Photonica Sinica

基　　金：江西省自然科学基金(2007GQS2057);江西省教育厅科技项目(GJJ08066)资助

摘　　要：根据对称入射时的自映像原理,设计了一种基于光子晶体多模波导的超微滤波器,对于进入该种器件的1.31μm和1.55μm两种通信波长的光信号,能够在通过一种波长的同时,对另一种波长进行阻隔,整个器件的长度不超过15μm.讨论了该滤波器的输出效率,并通过调整位于单模波导与多模波导联结处的介电柱位置对结构进行优化.优化后的结构具有高的输出效率和较宽的带宽.时域有限差分法的模拟结果表明该器件是可行的.Based on self-imaging principle, a kind of ultracompact multimode interference-based photonic crystal filter was designed. Using the filter,one wavelength can be filtered, but another one is intensively reflected by the proposed devices with two kinds of communication wavelengths 1.31 μm and 1.55μm. The total length of this device is less than 15 μm. The output efficiency was calculated. The optimization of the devices was achieved by adjusting the positions of the dielectric rods lying at the junctions between the multimode waveguides and single-mode waveguide, and the optimized structures have high efficiency and wide bandwidth. The devices are feasible from the finite-difference time-domain method results.

关 键 词：集成光学 滤波器 光子晶体多模波导 时域有限差分法 

分 类 号：TN252[电子电信—物理电子学]