%0 Journal Article
%T Approximate Ritz-Galerkin Method for Field Distribution of Graded-Index Optical Fibers<br>求解梯度光纤模场的近似里兹-伽略金方法
%A Wang Zihua
%A Zhang Hui
%A Xiao Zhongyin
%A <br>王子华
%A 张辉
%A 肖中银
%J 光子学报
%D 2006
%I 
%X Ritz-Galerkin method is used only for obtaining propagation constant and the radial mode field in core region of graded-index optical fibers.Cladding field has been constructed by using the accurate functional form (modified Bessel function) with two approximate parameters:the transverse decay constant in the cladding and the field value at core-cladding interface,which are already known.Numerical results show that the improvement on accuracy is significant.This approximate Ritz-Galerkin method has been applied to the calculation of coupling coefficient between two step-index optical fibers.Results are agreed well with exact values.
%K Fiber optics
%K Graded-index optical fibers
%K Laguerre-Gauss expansion
%K Modal fields
%K Coupling coefficient<br>光纤光学
%K 梯度型光纤
%K 拉盖尔-高斯函数展开
%K 模式场
%K 耦合系数
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=3AD4945DA47F09A4&yid=37904DC365DD7266&vid=6209D9E8050195F5&iid=DF92D298D3FF1E6E&sid=4CA738ADDC4F9A9D&eid=A73A882009D0AEFE&journal_id=1004-4213&journal_name=光子学报&referenced_num=4&reference_num=17