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. 17, 2013
Filed:
May. 04, 2012
Paul Crump, Berlin, DE;
Goetz Erbert, Löbau, DE;
Hans Wenzel, Berlin, DE;
Joerg Fricke, Berlin, DE;
Forschungsverbund Berlin e.V., Berlin, DE;
Abstract
A broad area laser, with high efficiency and small far-field divergence, has an active layer, a first contact and a second contact, each having a width larger than 10 μm. An anti-wave guiding layer, which is positioned laterally with respect to the active region, is enclosed between the first and second contacts, wherein a refractive index of the anti-wave guiding layer is larger than a minimum refractive index of cladding layers. A minimum distance between the anti-wave guiding layer and a projection of one of the contacts on the plane of the anti-wave guiding layer is between 0 and 100 μm.