光子晶体光纤的纤芯等效半径分析  

Study of Equivalent Core Radius of Photonic Crystal Fibers

作　　者：贾俊明[1] 陈明阳[1] 向阳[1] 于荣金[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：《光子学报》2005年第1期102-105,共4页Acta Photonica Sinica

基　　金：国家自然科学基金 (批准号 :6 0 2 770 0 7)资助课题

摘　　要：应用有限差分光束传播法和平面波展开法分别计算得到光子晶体光纤的基模有效折射率和包层有效折射率 ,结合阶跃折射率光纤的模色散方程解出该结构的等效芯半径 通过对不同结构下光子晶体光纤的研究 ,找到其等效芯半径随结构参数的变化规律 ,并根据计算结果将此规律以近似公式的形式给出The effective index of fundamental mode and effective cladding index for index-guiding photonic crystal fibers with triangular lattice are calculated by using finite-difference beam propagation method and plane wave expansion method, respectively. Then the equivalent core radius for photonic crystal fibers is obtained through putting them into the mode dispersion equation for step index fibers. Variational regularity of the normalized equivalent radius (rnorm = r/ [logical AND] ) with normalized frequency ( [logical AND] /λ ) is found out for different photonic crystal fiber parameters. Finally, the approximate formula for rnorm as a function of d/ [logical AND] and [logical AND] /λ, suitable to 2 [less-than or equal to] [logical AND] /λ [less-than or equal to] 10 and 0.2 [less-than or equal to] d/ [logical AND] [less-than or equal to] 0.7, is given out.

关 键 词：光子晶体光纤 等效芯半径 光束传播法 模色散方程 

分 类 号：TN248.1[电子电信—物理电子学]