WAVELENGTH TRANSFORMATION ELEMENT, OPTICAL WAVEGUIDE DEVICE FOR WAVELENGTH TRANSFORMATION, HARMONIC COMPONENT GENERATING DEVICE AND METHOD FOR MANUFACTURING WAVELENGTH TRANSFORMATION ELEMENT

摘要

PROBLEM TO BE SOLVED: To provide the wavelength transformation element of a quasi-phase matching system adaptive to a plurality of exciting light wavelengths by using the period polarization reverse structure of a specific period. ;SOLUTION: The wavelength transformation element 14A is provided with an optical waveguide 3 and period polarization reverse structures 2a, 2b and 12A formed in the optical waveguide 3. Light propagation directions B and C in the optical waveguide intersect an array direction A where polarization reverse parts are arrayed in the period polarization reverse structure.;COPYRIGHT: (C)2003,JPO