WAVELENGTH CONVERSION ELEMENT, WAVELENGTH CONVERTER AND WAVELENGTH CONVERSION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a wavelength conversion element whose wavelength conversion efficiency is heightened, which produces high optical output with a simple construction, a wavelength converter using the wavelength conversion element and a nonlinear wavelength conversion method usable in the wavelength conversion in the wavelength conversion element and in the wavelength converter.;SOLUTION: The wavelength conversion is carried out by reflecting light, incident from an incident end of a polarization reversing element, subjected to the wavelength conversion, and having reached to the other end, with a reflection body arranged on the other end of the polarization reversing element, making it reenter into the polarization reversing element while changing an optical path, and making it again propagate inside the polarization reversing element.;COPYRIGHT: (C)2006,JPO&NCIPI