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:
Nov. 13, 2001
Filed:
Jun. 12, 1998
Applicant:
Inventors:
Utpal Kumar Chakrabarti, Allentown, PA (US);
Robert Alan Hamm, Staten Island, NY (US);
Joseph Brian Seiler, Penn Township, Berks County, PA (US);
Gleb E. Shtengel, Upper Milford Township, Lehigh County, PA (US);
Lawrence Edwin Smith, Macungie, PA (US);
Assignee:
Agere System Optoelectronics Guardian Corp., Orlando, FL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 5/00 ;
U.S. Cl.
CPC ...
H01S 5/00 ;
Abstract
The invention is an optical device and method of fabrication which mitigates the problem of Zn migration in the cladding and waveguide regions. The contact region includes carbon, which acts as a p-type dopant in ternary semiconductor material. The contact layer is made of InGaAs or InGaAsP, and the invention is most advantageously used in an electroabsorption modulated laser or capped mesa buried heterostructure laser.