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利用分析转移矩阵方法 ,可精确计算任意折射率分布光波导模式的有效折射率。在此基础上 ,提出了逆分析转移矩阵方法 ,根据实验测量的导模有效折射率来拟合光波导的折射率分布 ,取得了比逆WKB方法更为合理的结果。
By analyzing the transfer matrix method, the effective refractive index of the waveguide mode with arbitrary refractive index distribution can be precisely calculated. On this basis, a method of inverse analysis of transfer matrix is proposed. Based on the experimentally measured effective refractive index of the guided mode, the refractive index distribution of the optical waveguide is fitted and a more reasonable result is obtained than the inverse WKB method.