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. 30, 2024
Filed:
Mar. 28, 2019
Applicant:
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Inventors:
Takuma Aihara, Tokyo, JP;
Shinji Matsuo, Tokyo, JP;
Tai Tsuchizawa, Tokyo, JP;
Takaaki Kakitsuka, Tokyo, JP;
Tatsurou Hiraki, Tokyo, JP;
Assignee:
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 5/10 (2021.01); H01S 5/02 (2006.01); H01S 5/026 (2006.01); H01S 5/14 (2006.01);
U.S. Cl.
CPC ...
H01S 5/1014 (2013.01); H01S 5/021 (2013.01); H01S 5/0261 (2013.01); H01S 5/142 (2013.01);
Abstract
A wavelength tunable laser formed on a substrate made of single-crystal silicon is provided. The wavelength tunable laser includes a light emitting portion made of a III-V compound semiconductor, and external resonators provided with an optical filter. Cores included in the external resonators are made of one of SiN, SiON, and SiO(n is smaller than 2).