スラブ形光導波路での屈折率分布の推定

概要

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An estimate method of the refractive index distribution in optical slab wavegaudes is proposed. It utilizes the height gain profiles of the received electric field strength generated from the waveguides. First of all, an initial value of refractive index distribution is given by applying the height gain profiles at different two spots in a finite diffrence beam propagation method (FD-BPM). Next, the height gain profile at one spot is derived from both the height gain profile at the other and the initial value using FD-BPM and the refractive index distribution is modified by comparing it with the height gain profile measured. Graded-index and step-index models are adopted as the refractive index distribution of optical waveguides to evaluate the calculation method of this refractive index. Numerical examples of the refractive index distribution to be derived from the height gain profile with each model are presented and considerd simultaneously.
明治大学の論文