带隙型光子晶体光纤慢光特性的优化设计  

Design and Optimization of Slow Light Photonic Bandgap Fiber

作　　者：云茂金[1] 梁健[1,2] 任立勇[2] 孔伟金[1] 万勇[1] 

机构地区：[1]青岛大学物理科学学院山东省光子学材料与技术重点实验室,山东青岛266071 [2]中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,陕西西安710119

出　　处：《光学学报》2013年第4期34-37,共4页Acta Optica Sinica

基　　金：国家自然科学基金(10904080;11144007;11274188);山东省博士基金(BS2011DX007);瞬态光学与光子技术国家重点实验室开放基金(SKLST201012)资助课题

摘　　要：设计了一种适用于脉冲无畸变慢光传输的带隙型光子晶体光纤。用平面波展开法分析了该带隙型光子晶体光纤的能带结构、群折射率以及群速度色散等特性。分析结果表明,通过对光子晶体光纤的内包层空气孔进行微流体填充,可以有效改善光子晶体光纤的慢光特性,并且得到了群折射率为6,带宽超过100nm的超宽带光子晶体慢光光纤,实现了宽带的平坦慢光传输。该带隙型光子晶体光纤在光纤通信、信息处理、光纤传感及光与物质相互作用中有广泛的应用前景。A novel type of photonic bandgap fiber （PBG-PCF） applied to pulse and slow light is proposed. The designed PBG-PCF is composed of a hollow core and seven cladding layers with air hole arranged by triangular lattice. Its band structure, group index and group velocity dispersion are analyzed in detail by using plane wave expansion method. The simulation results show that slow light property can be improved effectively by microfluid infiltration for the air holes of the inner cladding of PBG-PCF, and an ultra-wide-band photonic crystal slow light optical fiber with a group index of 6, a wide band more than 100 am, which can transmit flat slow light, is realized. The designed PBG- PCF has promising and potential applications in communication networks; signal processing, optical sensors and nonlinear interactions.

关 键 词：光纤光学 光子晶体光纤 平面波展开法 能带结构 群速度色散 慢光 

分 类 号：O436[机械工程—光学工程]