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:
Oct. 06, 2009
Filed:
Jul. 28, 2005
Applicant:
Taek Kim, Gyeonggi-do, KR;
Inventor:
Taek Kim, Gyeonggi-do, KR;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S 5/00 (2006.01); H01S 3/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
Embodiments include a laser pumping unit and a high power vertical external cavity surface emitting laser (VECSEL) device including the same. The laser pumping unit easily diffuses current in a traverse direction by using a tunnel junction. The laser pumping unit may include a substrate, a lower distributed brag reflector (DBR) layer formed on the substrate, an active layer with a quantum well structure formed on the lower DBR layer to generate a light having a predetermined wavelength, a tunnel junction layer formed on the active layer to increase resistance in a vertical direction, and an upper DBR layer formed on the tunnel junction layer.