【摘要】 本文用一级微扰理论，对指数型折射率分布光波导，进行了波方程的解析求解，推得用Ａｉｒｙ函数表示的场解和色散方程。用一级近似计算了传播常数（β／ｋ）ｍ，与Ｃｏｎｗｅｌｌ的精确计算相比较，其结果也是好的。更多还原

【Abstract】 For the planar optical wavesuide with exponential index profile.the wave equation is solved by means of first order perturbational mathod and analytical solution of mode field and mode dispersion equations are obtained in terms of Airy function.The propagation constants are calculated by the first order approximation.Compared to exact values of Conwell,the resuts are rather satisfactory.更多还原