The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 17, 1995
Filed:
Feb. 08, 1994
Sony Corporation, Tokyo, JP;
Abstract
An optical waveguide device for use as a second harmonic generator includes a nonlinear optical crystalline substrate of KTiOPO.sub.4 and an optical waveguide core of a dielectric material, such as Ta.sub.2 O.sub.5, disposed on the nonlinear optical crystalline substrate. The optical waveguide converts a fundamental wave having a wavelength .lambda. which is guided through the optical waveguide into a second harmonic wave having a wavelength .lambda./2, the second harmonic wave having the same polarization as the fundamental wave which is guided through the optical waveguide. The optical waveguide has a thickness of 190 nm or greater. The optical waveguide device also has a dielectric loaded strip disposed on the optical waveguide core. The dielectric loaded strip may be made of SiO.sub.2 or SiO.sub.2 doped with Ta.sub.2 O.sub.5. Alternatively, the optical waveguide may be a ridge-type optical waveguide, and the optical waveguide device may also has a cladding layer disposed on the nonlinear optical crystalline substrate and the optical waveguide core.