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:
Aug. 08, 2006
Filed:
Oct. 11, 2001
Brian Michael Corbett, Douglas, IE;
Brian Michael Corbett, Douglas, IE;
University of Ireland, Cork, Cork, IE;
Abstract
This invention relates to generally to semiconductor devices, for example lasers and more particularly to single frequency lasers and is directed at overcoming problems associated with the manufacture of these devices. In particular, a laser device is provided formed on a substrate having a plurality of layers (), the laser device comprising at least one waveguide (for example a ridge) established by the selective removal of sections of at least one of the layers. The ridge () has at least one defect defining region (), the at least one defect defining region of the ridge defining a defect in the ridge. The width of the ridge is greater in the at least one defect defining region of the ridge than in adjacent sections of the ridge.