说明：  基于光纤光栅的模式耦合理论, 用德拜势能法对纤芯、包层内的电磁场进行矢量分析, 得到纤芯及各包层中的各矢量场分量的表达式, 求解出纤芯和包层模的耦合常数和有效折射 率后, 利用数值积分的方法通过求解耦合模方程得到光纤光栅的透射率。
(Fiber grating-based mode coupling theory, with the Debye potential method of core, cladding electromagnetic field within the vector analysis, the core and the cladding of the various components of the expression vector field, solving the core and cladding mode coupling constant and effective refractive index, the use of numerical integration method coupled mode equations by solving the transmission rate of fiber gratings.)