OPTICAL WAVEGUIDE DEVICE, COHERENT LIGHT SOURCE AND OPTICAL APPARATUS USING SAID OPTICAL WAVEGUIDE DEVICE

摘要

An optical waveguide device has a substrate composed of a nonlinear optical material and a periodically domain-inverted structure having the same composition as the nonlinear optical material, where the domain-inverted structure has a refractive index distribution relying on the domain-inverted structure. <IMAGE>