摘要
基于平行波导横向耦合理论,研究了矩形气孔阵列的双芯光子晶体光纤的耦合特性,并数值计算了光纤的结构参量对耦合特性的影响。计算结果表明,在1.55μm波长处,增大竖直方向气孔间距或缩小横向气孔间距并减小气孔半径都有利于减小光纤的耦合长度,耦合长度差也相应减小。在此基础上设计了一种基于矩形晶格结构具有耦合长度极短(125μm)、分离比较高(38dB)的偏振分束器。
The coupling characteristics of dual-core photonic crystal fiber with rectangular holes array are researched based on horizontal coupling theory of parallel waveguide. The affections of fiber＇s structural parameters for coupling characteristics are numerically calculated. The simulation results demonstrate that enlarging hole pitch in vertical or reducing hole pitch in horizontal and decreasing hole diameter can shorten the coupling length of fiber and the difference of coupling length in X- and Y- polarization. A kind of polarization splitters based on rectangular lattice structure with minimal coupling length （125 μm） and higher extinction ratio （38 dB） is designed.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2013年第3期147-151,共5页
Chinese Journal of Lasers
基金
江苏省高校自然科学基金(09KJB140005)
南京邮电大学引进人才科研启动项目(NY207005)资助课题
关键词
光学器件
双芯光子晶体光纤
耦合长度
偏振分束器
分离比
optical devices dual-core photonic crystal fiber
coupling length
polarization splitter extinction ratio
