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:
Nov. 18, 2025
Filed:
Oct. 13, 2020
Applicant:
Mitsubishi Electric Corporation, Tokyo, JP;
Inventors:
Asami Uchiyama, Tokyo, JP;
Takeshi Yamatoya, Tokyo, JP;
Assignee:
Mitsubishi Electric Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 5/026 (2006.01); H01S 5/06 (2006.01); H01S 5/068 (2006.01);
U.S. Cl.
CPC ...
H01S 5/0265 (2013.01); H01S 5/0601 (2013.01); H01S 5/0617 (2013.01); H01S 5/06804 (2013.01); H01S 5/06808 (2013.01);
Abstract
A modulator-integrated semiconductor laser () includes a semiconductor laser (), an electro-absorption modulator (), and an optical attenuator () that are monolithically integrated. The electro-absorption modulator () and the optical attenuator () are connected in series in a stage succeeding the semiconductor laser (). A control unit () controls the DC bias voltage to be applied to the optical attenuator () to increase as temperature of the modulator-integrated semiconductor laser () rises.