径向非均匀光纤的改进阶梯法分析  

IMPROVED STAIRCASE APPROXIMATION ANALYSIS OF RADIALLY INHOMOGENEOUS FIBERS

作　　者：徐善驾[1] 马哲旺[1] 

机构地区：[1]中国科学技术大学

出　　处：《应用科学学报》1990年第3期189-196,共8页Journal of Applied Sciences

基　　金：国家自然科学基金资助项目

摘　　要：提出了一种分析径向非均匀光纤的改进阶梯近似法.这种方法把传输线网络的概念和严格的场匹配方法相结合,给出了一个新的求解公式,大大简化了经典阶梯法的求解过程.文中对几种典型径向非均匀光纤色散特性、能流密度分布以及群速、微分群时延的分析计算表明,文中方法比以前的阶梯法更简洁、更精确,并收敛得更快.In this paper, an improved staircase approximation method for analysing radially inhomogeneous fibers is advanced. This method combines the eoncept of the transmission line network with the rigorous mode matching procedure, and a new solving formula is obtained. Thus the procedure of the classical staircase approxi-mation is tremendously simplified. The analyses and computations of the dispersion, the Poynting flux distribution, the group velocity and the differential group delay for several representative radially inhomogeneous fibers of praotioal interest show that the present method is more succinct, more accurate and more rapidly convergent than the previous staircase approximation method.

关 键 词：光纤 非均匀 阶梯法 色散 能流密度 

分 类 号：TN25[电子电信—物理电子学]