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:
Jan. 30, 1990
Filed:
Aug. 18, 1988
Jacob Khurgin, Ellicott City, MD (US);
North American Philips Corp., New York, NY (US);
Abstract
A device for doubling the frequency of electromagnetic radiation. The device includes a non-linear substrate having a non-linear optical waveguide of a differing refractive index disposed thereon. The waveguide layer includes an inverted polarization interface at which the direction of polarization of the waveguide abruptly changes in sign. Radiation directed across the device parallel to the plane of the inverted polarization interface will be doubled in frequency by the interface. The inverted polarization interface may be achieved in a number of ways. The interface may be directly grown on the substrate or a single layer waveguide may be cleaved and flipped over upon itself. Finally, the waveguide may be formed by the growth of asymmetric mirror image quantum wells on either side of a plane to form the interface.