基于二维光子晶体中多模干涉效应(MMI)设计了一种新型的三波长波分解复用器,模拟结果表明,该结构能有效地分离1310 nm/1500 nm/1550 nm三个波段的波长.当改变该波分解复用器的相关结构参数时,该结构能拓展至其他波段.除此之外,该结构也能单独作为两波长波分解复用器对1310 nm/1550 nm实现分离.该波分解复用结构对三个波长的透射率均在91％以上.与此同时,借助于平面波展开法及时域有限差分法,对光波在该结构的传播效率及传播行为进行了计算及模拟.
A novel wavelength division demultiplexer (WDDM) based on the multi-mode interference effect (MMI) in 2D photonic crystal is presented,and it can separate three wavelengths effectively.This device takes 1310 nm/1500 nm/1550 nm for example here,and it can be extended to other wavelengths by changing the structure parameters.In addition,it can be also used to realize the separation for 1310 nm/1550 nm alone.The structure of WDDM composes of three MMI regions,which can make two wavelengths get through and one wavelength reflect back.The transmissions are above 91％.At the same time,by virtue of the plane wave expansion (PWE) and finite-difference time-domain method (FDTD),we simulate the performance.
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