摘要
本文采用指数函数拟合光纤基模端面衍射场光束参量与光纤基本参数的关系,分别得到了各个光束参量与光纤归一化频率V和光纤芯层半径a关系的解析表达式。把曲线拟合得到的基于V和a表达的解析函数的计算结果,与基于光纤芯层参量U、包层衰减参量W和光纤芯层半径a表达的解析函数的计算结果相比,当1.5<V<9.4,最大相对误差都小于2%。这些表达式可为快速分析和计算光纤基模端面衍射光束参量提供理论支持。
The exponential function is used to fit the curves between the beam parameters in the diffractive field of LP01 mode fiber end surface and the basic parameters of fiber. The fitting function between mode field radius in the near field, angular radius of far field divergence, beam propagation factor and the normalized frequency with the core layer radius are obtained respectively. The computed results from the fitting functions are very close to that from the analytical functions, when 1.5 %V% 9.4, the maximal relative error is smaller than 2%. In a certain degree, these conclusions will provide academic foundation for analyzing or calculating the beam parameters approximately.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2007年第7期1219-1223,共5页
Acta Photonica Sinica
基金
the Natural Science Foundation of Fujian Province(A0540001)
the Program of the Science and Technology Depart ment of Fujian Province(K04022)
关键词
导波光学
光束参量
近场模场半径
远场发散角角半径
光束传输因子
Guided optics
Beam parameters
Mode field radius in the near field
Angular radius of far field divergence
Beam propagation factor
作者简介
Tel： 13055911152 Email： llh065@126.com LI Lian-huang University in 2 Technology, Fu theory and optic was born in Quanzhou, Fujian province. He graduated from Fujian Normal 000. Now he is a postgraduate at Institute of Laser ＆ Optoelectronics jian Normal University. His main research interests focus on the diffraction al waveguide theory.
