三包层WⅠ和WⅡ型单模光纤波导色散特性的研究  

Analysis of Waveguide Dispersion Characteristics of WⅠ-and WⅡ-Type Triple-Cladding Single-Mode Fibers

作　　者：张晓萍[1] 田祥庆[1] 

机构地区：[1]兰州大学信息科学与工程学院,兰州730000

出　　处：《光学学报》2003年第5期581-586,共6页Acta Optica Sinica

基　　金：高等学校骨干教师资助计划 ( 2 0 0 0 6 5 )资助课题。

摘　　要：研究了三包层WⅠ和WⅡ型单模光纤的波导色散特性。结果发现在相同条件下 ,三包层WⅠ和WⅡ型单模光纤零色散点的调节范围比传统的双包层W型单模光纤明显增大。详细分析了几何参量P、Q和光学参量R1、R2 对单模传输时的波导色散特性和低次模截止频率的影响。所得的研究结果为获得更为理想的色散补偿、色散平坦光纤及设计新型无源光器件提供了重要的依据。计算波导色散的方法可推广到多包层光纤。Waveguide dispersion characteristics of two kinds of triple-cladding single-mode fibers named WⅠ and WⅡ is discussed. According to authors′ research, it is concluded that the range of the zero dispersion point of the WⅠ-and WⅡ-type single-mode fibers is obviously larger than that of the conventional W-type single-mode fibers under the same condition. The influences of the geometric parameters P, Q and optical parameters R 1, R 2 on the waveguide dispersion and cutoff frequency of low order modes for WⅠ-and WⅡ-type fibers are analyzed. The result provides a significant reference for the designs of new types of dispersion-flattened fiber, dispersion-shifted fiber and passive optical devices. The method to calculate waveguide dispersion can be applied to multi-cladding fibers.

关 键 词：波导光学 三包层光纤 波导色散 零色散点 截止频率 色散补偿 色散平坦光纤 

分 类 号：TN814.6[电子电信—信息与通信工程] TN253