太赫兹双空芯光纤定向耦合器  

Terahertz dual air core fiber directional coupler

作　　者：姜子伟[1] 白晋军[2] 侯宇[1] 王湘晖[1] 常胜江[1] 

机构地区：[1]南开大学,现代光学研究所,天津300071 [2]天津工业大学,电子与信息工程学院,天津300387

出　　处：《物理学报》2013年第2期534-539,共6页Acta Physica Sinica

基　　金：国家高技术研究发展计划项目(批准号:2011AA010205);国家自然科学基金(批准号:61171027);天津市自然科学基金重点项目(批准号:10JCZDJC15200);教育部博士点基金(批准号:20090031110033)资助的课题~~

摘　　要：设计了一种低损耗太赫兹双芯光子带隙光纤定向耦合器.采用全矢量有限元法对光纤的耦合特性、损耗和色散进行了理论分析.结果表明,这种光纤定向耦合器在1.55—1.80THz范围内耦合长度小于1.8cm,能够实现0.07THz范围内窄带耦合,且其损耗系数低于0.02cm^(-1).这种耦合器将在太赫兹窄带滤波、波分复用、开关和偏振分离等技术中有潜在应用价值.A novel low-loss dual-core fiber directional coupler for terahertz raditional is proposed, Coupling properties, loss and group velocity dispersion of the fibers are investigated by the full-vector finite-element method （FEM）. The simulation results demonstrate that the coupling length of this coupler is less than 1.8 cm between 1.55 and 1.80 THz, and the coupling broadband of 0.07THz can be realized. And the loss coefficient of the coupler is less than 0.02 cm^-1. The directional coupler has potential applications in narrowband filtering, wavelength-division multiplexing, switching, polarization splitter and so on.

关 键 词：太赫兹 双芯光子带隙光纤 光纤耦合器 耦合长度 

分 类 号：TN622[电子电信—电路与系统]