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:
Jun. 08, 2021
Filed:
Oct. 19, 2017
Sony Corporation, Tokyo, JP;
Tatsushi Hamaguchi, Kanagawa, JP;
Jugo Mitomo, Kanagawa, JP;
Hiroshi Nakajima, Kanagawa, JP;
Masamichi Ito, Miyagi, JP;
Susumu Sato, Kanagawa, JP;
Noriyuki Futagawa, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A surface-emitting laser according to an embodiment of the present disclosure includes a current constriction region having an opening and formed by impurities injected into a laminate from side of a second semiconductor layer; and a first DBR layer on side of a first semiconductor layer and a second DBR layer on the side of the second semiconductor layer having the laminate interposed therebetween at a position facing the opening. At the opening, an opening diameter close to the first DBR layer is larger than an opening diameter close to the second DBR layer.