Phase-shifted photonic crystal waveguide gratings and their application for wavelength demultiplexing

被引：23

作者：

Chen, Chao ^{[1
]}

Li, Xuechun ^{[1
]}

Li, Hanhui ^{[1
]}

Xu, Kun ^{[1
]}

Lin, Jintong ^{[1
]}

机构：

[1] Beijing Univ Posts & Telecommun, Key Lab Opt Commun & Lightwave Technol, Minist Educ, Beijing 100876, Peoples R China

来源：

OPTICAL ENGINEERING | 2008年 / 47卷 / 02期

关键词：

photonic crystal; waveguide gratings; phase shift; optical communications;

D O I：

10.1117/1.2844716

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Standard photonic crystal (PC) waveguide gratings show a stopband only in reflection. By incorporating single or multiple phase-shift regions into the PC waveguide gratings, an extremely narrow transmission peak opens up in the reflection band. Using coupled-mode theory together with transfer-matrix formalism, it is shown that by properly choosing the magnitudes of the phase shifts, the transmission spectrum can be tailored into a nearly rectangular line shape. As a specific application, the designed phase-shifted PC waveguide gratings can be used as a filter in dense wavelength-division-multiplexed (DWDM) optical communication systems with a 100-GHz channel spacing. The theoretically calculated results are numerically verified by using two-dimensional (2-D) finite-difference time-domain (FDTD) method. (C) 2008 Society of Photo-Optical Instrumentation Engineers.

引用

页数：4

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