【摘要】 掺半导体玻璃波导的折射率分布是通过多模波导有效折射率测量得到的.当耦合进入波导的激光功率密度变化时,可在不同模深度处,测量到波导的非线性折射率系数,并获得波导非线性折射率系数与功率密度的关系.从而得到波导的非线性饱和值为1.54×1O^-4.更多还原

【Abstract】 In this report, the refractive index-profile of semiconductor-doped glass waveguide has been determined based on the measurement of effective refractive indices of the multi-mode waveguide. Firstly, a reiterative method is used to determine the surface refractive index of waveguide with the effective refractive index measured. And then the different order mode depth and the effective refractive-indices of waveguide are evaluated by computer with the Fermi refractive index-profile mode equation. When laser power density coupled into the waveguide is changed, the nonlinear refractive index coefficient of the waveguide can be measured in different mode depth. So the nonlinear refractive index coefficient versus power densities is obtained and the nonlinear saturation value is 1.54×10-4.更多还原