多信道异质结构光子晶体滤波器

发布时间：2018-08-29 17:55

【摘要】：利用二维正方晶格介质柱型光子晶体(PC),设计了一款由4个线性渐变型微腔和异质结构光子晶体反射器组成的多信道下路滤波器。利用平面波展开法(PWE)以及二维时域有限差分法(2D-FDTD)分析了该异质结构滤波器的工作机制,并进一步探究了微腔参考面与异质结界面之间距离对下路效率的影响。研究表明,滤波器中的异质结反射器可以实现接近100%的反射,从而大幅度地提高了三端口滤波器的滤波效率。设计的多信道滤波器各个通道都能有效地实现下路滤波功能,其信道间隔为10nm,滤波效率均在90%以上,透射谱半高宽均在0.54nm以下,实现了较高的品质因子特性。该滤波器尺寸只有15.15μm×13.91μm,且滤波效率很高,适于在波分复用系统中进行复用与解复用,在未来光路集成应用中具有良好的应用前景。
[Abstract]:A multichannel downpath filter consisting of four linear graded microcavities and a heterostructure photonic crystal reflector is designed by using two-dimensional square lattice dielectric columnar photonic crystal (PC),). The working mechanism of the heterostructure filter is analyzed by the plane wave expansion method (PWE) and the two-dimensional finite-difference time-domain (2D-FDTD) method, and the influence of the distance between the microcavity reference plane and the heterojunction surface on the lower path efficiency is further explored. It is shown that the heterojunction reflector in the filter can achieve nearly 100% reflection, which greatly improves the filtering efficiency of the three-port filter. Each channel of the designed multichannel filter can effectively realize the function of lower channel filtering. The channel interval is 10 nm, the filtering efficiency is above 90%, and the transmission spectrum half maximum width is below 0.54nm. The size of the filter is 15.15 渭 m 脳 13.91 渭 m, and the filter efficiency is very high. It is suitable for multiplexing and demultiplexing in wavelength division multiplexing system.
【作者单位】：广西师范大学电子工程学院光电子与光通信实验室;
【基金】：广西科学研究与技术开发计划课题(No.1598007-12) 广西研究生教育创新计划资助项目(No.YCSZ2015097)
【分类号】：TN929.1;TN713

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