CAJ | 학술논문

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.
본문채용지수함수의합광섬기모단면연사장광속삼량여광섬기본삼수적관계,분별득도료각개광속삼량여광섬귀일화빈솔V화광섬심층반경a관계적해석표체식.파곡선의합득도적기우V화a표체적해석함수적계산결과,여기우광섬심층삼량U、포층쇠감삼량W화광섬심층반경a표체적해석함수적계산결과상비,당1.5＜V＜9.4,최대상대오차도소우2%.저사표체식가위쾌속분석화계산광섬기모단면연사광속삼량제공이론지지.
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.