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结合非均匀球粒子对平面波散射的散射场计算的改进算法,提出了平面波垂直入射无限长分层圆柱散射场快速稳定而有效的改进电磁散射算法。与已有算法相比,改进算法所能计算的无限长非均匀介质圆柱的尺寸参量突破10000,计算层数达到106,并且计算时间很短,最多仅为几秒。该算法可以用于不同的波段以及不同领域的任意无耗或吸收无限长圆柱体散射场的计算。最后将该算法应用于梯度折射率聚合物光纤(GI-POF)散射特性的研究,为非接触、在线测量聚合物光纤折射率分布提供了理论依据。
In this paper, an improved algorithm is proposed to improve the scattering of scattered waves by using non-uniform spherical particles. Compared with the existing algorithms, the size of the infinitely inhomogeneous dielectric cylinder that the improved algorithm can calculate exceeds 10000, the calculated number of layers reaches 106, and the calculation time is very short, up to only a few seconds. The algorithm can be used in different wavebands and the calculation of any scattering field of infinite cylinders with infinite absorption or absorption in different fields. Finally, the algorithm is applied to the study of the scattering properties of gradient index polymer optical fiber (GI-POF), which provides a theoretical basis for non-contact and online measurement of refractive index distribution of polymer optical fiber.