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. 25, 2005
Filed:
Dec. 26, 2002
Nobuhiro Ohkubo, Ikoma, JP;
Nobuhiro Ohkubo, Ikoma, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
In a semiconductor laser element, a semiconductor layer interfacecontaining oxygen atoms is present above an active layerin at least an internal region of a laser resonator. Also, the peak wavelength of photoluminescence of the active layerin regions in the vicinity of end faces of the laser resonator is made shorter than that of the active layer in the internal region of the laser resonator. In the internal region of the laser resonator, vacancies (crystal defects) produced above and in the neighborhood of the semiconductor layer interface containing oxygen atoms are captured at this semiconductor layer interface. Diffusion of the vacancies to the active layer is thus suppressed.