光通信研究Issue(4)：43-45,3.DOI:10.13756/j.gtxyj.2014.04.014
基于光子晶体慢光实现光缓存
Realization of photonic crystal slow-light-based optical buffers
摘要
Abstract
Slow-light technology is a key technology for realizing optical buffers in all-optical networks.In order to realize slow light with low group velocity and large bandwidth,this paper designs a novel waveguide structure,which is based on two-di-mensional square lattices with the dielectric cylinder rotated by -45°so as to produce line defects,achieves slow light trans-mission and applies it to the optical buffer technology.In addition,it optimizes the slow light performances of the structure further by changing the radius of the dielectric cylinder and the width of the waveguide,conducts calculation and simulation by using the supercell-based plane wave expansion method,obtaining the dispersion curve of the defected mode.Furthermore,it analyzes in detail the properties of transmission group velocity and group velocity dispersion of light in waveguide and achieves the maximum group speed of only 0.007 89c (c is the speed of light in vacuum),and the group velocity dispersion in the range-106~106 ps2/km.When a designed 1 mm-long photonic crystal structure is applied to the optical buffer,it can achieve the maximum cache time of 2.778 ps and the maximum cache capacity of 145.98 bit.关键词
光子晶体/慢光/光缓存器Key words
photonic crystal/slow light/optical buffer分类
信息技术与安全科学引用本文复制引用
齐菡,施伟华..基于光子晶体慢光实现光缓存[J].光通信研究,2014,(4):43-45,3.基金项目
国家自然科学基金资助项目(61275067) （61275067）
江苏省高校自然科学研究项目(12KJB510018) （12KJB510018）
