七芯光子晶体光纤耦合特性的研究  

Research on coupling characteristics of seven-core photonic crystal fiber

作　　者：耿鹏程[1] 侯蓝田[1] 韩伟涛[1] 庞辉[1] 

机构地区：[1]燕山大学信息科学与工程学院,河北秦皇岛066004

出　　处：《燕山大学学报》2010年第4期349-353,共5页Journal of Yanshan University

基　　金：国家自然科学基金重点资助项目(60637010)

摘　　要：根据七芯光子晶体光纤(PCF)7个超模的特征,给出了七芯PCF耦合长度的一种计算方法,揭示了七芯PCF的七个超模与耦合特性之间的内在联系。利用有限差分光束传播法(FD-BPM)分析了七芯PCF的耦合特性,发现其耦合长度随着传输波长的增加而减小;随着纤芯与包层材料折射率之差和纤芯之间距离的增大而增加;还分析了七芯PCF的横向不均匀性、纵向不均匀性、位置偏移等因素对其耦合特性的影响,为设计七芯PCF的结构提供了理论依据。According to characteristics of the seven-core photonic crystal fiber＇s （PCF） supermode intensity distribution, a calculation method of the coupling length of the seven-core PCF is given, the intrinsic link between supermode of seven-core PCF and coupling characteristics is revealed.Through finite difference beam propagation method （FD-BPM）,the coupling characteristics of seven-core PCF is analyzed, the law of coupling-length decreases with increasing wavelength, increases with increasing refractive index difference between cores and inner-cladding and distance between cores is found. The impact of horizontal nonuniformity, vertical nonuniformity and position deviation of seven-core PCF on coupling characteristics is also analyzed, a theoretical basis for design of the structure of the seven-core PCF is provided.

关 键 词：光子晶体光纤 超模 相干合成 耦合长度 

分 类 号：TN253[电子电信—物理电子学]