基于二维光子晶体的四通道滤波器设计

Design of four-channel filter based on two-dimensional photonic crystal

为实现光电信息器件的高集成度和高效输出,提高光电信息处理能力,设计了一种基于二维光子晶体的四通道滤波器,根据4个点缺陷微腔与线缺陷波导耦合原理,引入反射异质结并调整微腔与反射结的距离,提高输出效率,对滤波器1403、1426、1449、1508 nm四波长的波分复用功能进行仿真。仿真结果表明:该器件可实现高效传输,四波长透射率均超过95%,插入损耗均小于0.23 dB,通道间串扰均小于-8.7 dB。

In order to achieve high integration and efficient output of optoelectronic information devices,and improve the optoelectronic information processing ability,a four-channel filter based on two-dimensional photonic crystals is designed.According to the coupling principle of four point defect microcavities and line defect waveguides,the reflection heterojunction is introduced and the distance between the micro-cavity and the reflection junction is adjusted to improve the output efficiency.The wavelength division multiplexing function of four-wavelength of 1403,1426,1449 and 1508 nm is simulated.The simulation results show that the device can achieve efficient transmission,the transmission of all four wavelengths is more than 95%,the insertion loss is less than 0.23 dB,and the cross-talk between channels is less than-8.7 dB.