摘要
A method is proposed to recover the refractive index profile of graded waveguide from the effective indices by a cubic spline interpolation function. Numerical analysis of several typical index distributions show that the refractive index profile can be reconstructed closely to its exact profile by the presented interpolation model.
A method is proposed to recover the refractive index profile of graded waveguide from the effective indices by a cubic spline interpolation function. Numerical analysis of several typical index distributions show that the refractive index profile can be reconstructed closely to its exact profile by the presented interpolation model.
基金
Supported by the National Natural Science Foundation of China under Grant No 60477016, the Foundation for Development of Science and Technology of Shanghai （04DZ14001）, and the Excellent Young Teachers Programme of the Ministry of Education of China.
