Proposal of an Ultracompact Triplexer Using Photonic Crystal Waveguide with an Air Holes Array  

作　　者：何灵娟 徐旭明 刘念华 于天宝 方利广 廖清华 

机构地区：[1]Department of Physics, Nanchang University, Nanchang 330031 [2]Institute for Advanced Study, Nanchang University, Nanchang 330031 [3]State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083

出　　处：《Chinese Physics Letters》2010年第8期84-87,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 10664002, the Natural Science Foundation of Jiangxi Province under Grant Nos 0612043, 2007CQW2057 and 2007GZW2457, and the Open Funds of the State Key Laboratory on Integrated Optoelectronics of Institute of Semiconductors （IOSKL-KF200901）.

摘　　要：We propose an ultracompact triplexer based on a shift of the cutoff frequency of the fundamental mode in a planar photonie crystal waveguide （PCW） with a triangular lattice of air holes. The shift is realized by modifying the radii of the border holes adjacent to the PCW core. Some defect holes are introduced to control the beam propagation. The numerical results obtained by the finite-difference time-domain method show that the presented triplexer can separate three specific wavelengths, i.e. 1310, 1490 and 1550nm with the extinction ratios higher than -18 dB. The designed device with a size as compact as 12 μm × 6.5μ m is feasible for the practical application, and can be utilized in the system of fiber to the home.We propose an ultracompact triplexer based on a shift of the cutoff frequency of the fundamental mode in a planar photonie crystal waveguide （PCW） with a triangular lattice of air holes. The shift is realized by modifying the radii of the border holes adjacent to the PCW core. Some defect holes are introduced to control the beam propagation. The numerical results obtained by the finite-difference time-domain method show that the presented triplexer can separate three specific wavelengths, i.e. 1310, 1490 and 1550nm with the extinction ratios higher than -18 dB. The designed device with a size as compact as 12 μm × 6.5μ m is feasible for the practical application, and can be utilized in the system of fiber to the home.

分 类 号：TN252[电子电信—物理电子学] TN948.41