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:
Sep. 29, 1998
Filed:
Aug. 07, 1997
Applicant:
Inventors:
William Scott Hobson, Summit, NJ (US);
Daryoosh Vakhshoori, Chatham Township, Morris County, NJ (US);
Assignee:
Lucent Technologies Inc., Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S / ; G02B / ;
U.S. Cl.
CPC ...
372 45 ; 372 50 ; 385129 ;
Abstract
The inventive III/V semiconductor lasers comprise mode-shaping layers disposed in the upper and lower cladding regions, respectively, and having larger refractive index than the adjoining cladding material. Incorporation of the mode-shaping layers can significantly spread the mode structure of the laser, with attendant reduction of beam spreading. Preferred embodiments are Al-free III/V semiconductor lasers. Especially preferred are such lasers that do not have quaternary III/V semiconductor material between active region and substrate, for improved heat removal.