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:
Jul. 06, 2004
Filed:
Jul. 27, 2001
Applicant:
Inventors:
John Haig Marsh, Glasgow, GB;
Craig James Hamilton, Renfrewshire, GB;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 5/34 ;
U.S. Cl.
CPC ...
H01S 5/34 ;
Abstract
There is disclosed an improved semiconductor laser device ( ). Previous high power (greater than a few hundred milliwatts output) semiconductor lasers suffer from a number of problems such as poor beam quality and low brightness. The invention therefore provides a semiconductor laser device ( ) including at least one portion which has been Quantum Well Intermixed (QWI) and means for providing gain profiling within an active portion of the device ( ). In a preferred implementation the device ( ) provides a Wide Optical Waveguide (WOW).