Distributions of Electric Field and Induced Nonlinearity in Periodic Poling

概要

論文の詳細を見る
A theoretical model is unprecedentedly formulated for the macroscopic description of an electric field and an induced second-order nonlinearity by periodic poling in a waveguide. A fundamental field distribution between a set of two electrodes with a finite width is first proposed and then, by using linear superposition and electrode periodicity, the net electric fields generated in the waveguides are derived explicitly. A mean distribution of quasi phase matching and a generalized electrode width are introduced to analyze the poling-induced characteristics of the second-order nonlinear coefficient. Four types of poling schemes, depending on the electrode structure, are discussed from a quantitative viewpoint of calculating a quasi phase matching efficiency in the periodic poling and thus enhancing the conversion efficiency in a nonlinear optical phenomenon. The maximized efficiency and the corresponding optimized width of the shortened electrode are determined in poling experiments by means of the present approach.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2003-12-15