Title :
Novel Kind of Semislow Light Photonic Crystal Waveguides With Large Delay-Bandwidth Product
Author :
Hao, Ran ; Cassan, Eric ; Kurt, Hamza ; Hou, Jin ; Le Roux, Xavier ; Marris-morini, Delphine ; Vivien, Laurent ; Gao, Dingshan ; Zhou, Zhiping ; Zhang, Xinliang
fDate :
6/1/2010 12:00:00 AM
Abstract :
A novel type of semislow light photonic crystal waveguide obtained by shifting the boundaries of a W1 waveguide in the direction of light propagation is presented. The structure produces unusual "U-type" group index -frequency curves, which results in a nearly constant group index ng over large bandwidth. A versatile control of ng (11 <; ng 210) with large normalized delay-bandwidth products ranging from 0.1363 to 0.3141 is obtained at the wavelength of 1550 nm using a unique geometrical parameter. Additionally, depending on the chosen waveguide geometry, ultralow group velocity dispersion (GVD) values in large slow light bandwidth can be achieved, with controllable positive or negative GVD.
Keywords :
light propagation; optical waveguides; photonic crystals; U-type group index-frequency curves; W1 waveguide; large delay-bandwidth product; large slow light bandwidth; light propagation; nearly constant group index; semislow light photonic crystal waveguides; ultralow group velocity dispersion; waveguide geometry; wavelength 1550 nm; Dispersion compensation; group index; group velocity dispersion (GVD); photonic crystals (PCs); slow light; waveguide;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2010.2046403