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:
Mar. 17, 2020
Filed:
Nov. 13, 2018
Sumitomo Electric Industries, Ltd., Osaka, JP;
Kei Fujii, Osaka, JP;
Toshiyuki Tanahashi, Osaka, JP;
Takashi Ishizuka, Osaka, JP;
Susumu Yoshimoto, Osaka, JP;
Takamichi Sumitomo, Osaka, JP;
Koji Nishizuka, Osaka, JP;
Suguru Arikata, Osaka, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
A vertical cavity surface emitting laser includes: a supporting base having a principal surface including III-V compound semiconductor containing gallium and arsenic as constituent elements; and a post disposed on the principal surface. The post has a lower spacer region including a III-V compound semiconductor containing gallium and arsenic as group-III elements, and an active layer having a quantum well structure disposed on the lower spacer region. The quantum well structure has a concentration of carbon in a range of 2×10cmor more to 5×10cmor less. The quantum well structure includes a well layer and a barrier layer. The well layer includes a III-V compound semiconductor containing indium as a group-III element, and the barrier layer includes a III-V compound semiconductor containing indium and aluminum as group-III elements. The lower spacer region is disposed between the supporting base and the active layer.