Compact triplexer in two-dimensional hexagonal lattice photonic crystals  

作　　者：任宏亮 马建平 温浩 覃亚丽 吴哲夫 胡卫生 姜淳 金耀辉 

机构地区：[1]College of Information Engineering,Zhejiang University of Technology [2]College of Computer Science and Technology,Zhejiang University of Technology [3]State Key Laboratory of Advanced Optical Communication Systems and Networks,Shanghai Jiao Tong University

出　　处：《Chinese Optics Letters》2011年第4期87-90,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 60978010, 60907032, and 60825103);the Natural Science Foundation of Zhejiang Province (No. Y1090169);the Foundation of Zhejiang University of Technology (No. 0901103012408);the Open Fund of the State Key Laboratory of Advanced Optical Communication Systems and Networks, China (No. 2008sh07)

摘　　要：We design a compact triplexer based on two-dimensional （2D） hexagonal lattice photonic crystals （PCs）. A folded directional coupler （FDC） is introduced in the triplexer beside the point-defect micro-cavities and line-defect waveguides. Because of the reflection feedback of the FDC, high channel drop efficiency can be realized and a compact size with the order of micrometers can be maintained. The proposed device is analyzed using the plane wave expansion method, and its transmission characteristics are calculated using the finite-difference time-domain method. The footprint of the triplexer is about 12 9 μm, and its extinction ratios are less than -20 dB for 1310 nm, approximately -20 dB for 1490 nm, and under -40 dB for 1550 nm, making it a potentially essential device in future fiber-to-the-home networks.We design a compact triplexer based on two-dimensional （2D） hexagonal lattice photonic crystals （PCs）. A folded directional coupler （FDC） is introduced in the triplexer beside the point-defect micro-cavities and line-defect waveguides. Because of the reflection feedback of the FDC, high channel drop efficiency can be realized and a compact size with the order of micrometers can be maintained. The proposed device is analyzed using the plane wave expansion method, and its transmission characteristics are calculated using the finite-difference time-domain method. The footprint of the triplexer is about 12 9 μm, and its extinction ratios are less than -20 dB for 1310 nm, approximately -20 dB for 1490 nm, and under -40 dB for 1550 nm, making it a potentially essential device in future fiber-to-the-home networks.

关 键 词：Crystal lattices DEFECTS Fiber optic networks Finite difference time domain method Multiplexing equipment Optical waveguides Personal communication systems Time domain analysis Two dimensional 

分 类 号：O734[理学—晶体学]