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:
Jul. 14, 2009
Filed:
Dec. 07, 2005
Alexey Kovsh, Dortmund, DE;
Alexey Zhukov, St. Petersburg, RU;
Daniil Livshits, Dortmund, DE;
Igor Krestnikov, Dortmund, DE;
Alexey Kovsh, Dortmund, DE;
Alexey Zhukov, St. Petersburg, RU;
Daniil Livshits, Dortmund, DE;
Igor Krestnikov, Dortmund, DE;
Innolume GmbH, Dortmund, DE;
Abstract
A quantum dot laser operates on a quantum dot ground-state optical transition. The laser has a broadband (preferably≧15 nm) spectrum of emission and a high output power (preferably≧100 mW). Special measures control the maximum useful pump level, the total number of quantum dots in the laser active region, the carrier relaxation to the quantum dot ground states, and the carrier excitation from the quantum dot ground states. In one embodiment, a spectrally-selective loss is introduced into the laser resonator in order to suppress lasing on a quantum dot excited-state optical transition, thereby increasing the bandwidth of the emission spectrum.