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:
Dec. 03, 2002
Filed:
Jul. 27, 2000
Yasumasa Inomoto, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A semiconductor laser is fabricated on a substrate having a laser section and a modulator section by forming a light waveguide having an active layer that extends across the laser section and the modulator section from a high reflectivity end portion to a low reflectivity end portion. The light waveguide is enclosed by an embedding structure in which first and second high resistance regions are produced on the opposite sides of the light waveguide for confining electrons between the high resistance regions. On the embedding structure are first and second contact regions corresponding respectively to the laser section and the modulator section. Portions of the substrate other an the first and second elongated contact regions are covered with an insulating layer. First and second electrodes are formed on the insulating layer for establishing ohmic contact with the first and second elongated contact regions, respectively.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile