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. 24, 2004
Filed:
Nov. 18, 2002
Applicant:
Inventor:
Joseph Hy Abeles, Highland Park, NJ (US);
Assignee:
Trumpf Photonics, Inc., Cranbury, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 5/00 ;
U.S. Cl.
CPC ...
H01S 5/00 ;
Abstract
A distributed feedback ridge waveguide semiconductor laser diode having a waveguide region with a typical thickness of at least 500 nanometers and an effective refractive index difference between the ridge structure and exposed portions of the waveguide region which surround the ridge structure of less than 0.001. This permits the width of the ridge to be expanded beyond 3.5 microns thus translating directly to higher power outputs at 1.55 &mgr;m wavelengths, where carrier diffusion and carrier heating limit current density injected into the active region.