An optical wavelength converting device is provided with a LiTaO3 substrate, a plurality of inverted-polarization layers periodically arranged in an upper surface of the LiTaO3 substrate, and an optical waveguide crossing the inverted-polarization layers. The upper surface of the LiTaO3 substrate is directed toward a -X-crystal axis direction. The inverted-polarization layers are formed by exchanging Ta<+> ions of the LiTaO3 substrate for H<+> ions, and an extending direction of each inverted-polarization layer is inclined at an angle of theta degrees (6 </= theta </=174) to the +C-crystal axis direction toward a -Y-crystal axis direction. The optical waveguide is formed by exchanging Ta<+> ions of the LiTaO3 substrate and the inverted-polarization layers for H<+> ions to set a refractive index of the optical waveguide higher than that of the LiTaO3 substrate. The optical waveguide extends in a +Y-crystal axis direction. Fundamental waves polarized in a transverse electric mode induce electric field directed in +/-Y-crystal axis directions and are converted into second harmonic waves in the optical waveguide. <IMAGE>
申请公布号
DE69322585(D1)
申请公布日期
1999.01.28
申请号
DE1993622585
申请日期
1993.10.07
申请人
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., KADOMA, OSAKA, JP