OPTICAL WAVELENGTH CONVERTER

摘要

PURPOSE:To decrease the transmission loss of an optical waveguide by using an ion exchange method for confining the light in the thickness direction and using a loading type optical waveguide structure to confine the light in the transverse direction. CONSTITUTION:A thin film-like refractive index increasing part 5 is formed on the surface of an LiNbO3 substrate 1 and a loading part 6 is formed atop the same. The light is mainly confined in a thin film-like refractive index increasing part 7 under the loading part 6 and propagates therein and therefore the incident light of semiconductor laser light 3 is propagated at a low loss and the wavelength conversion with high efficiency is made possible.