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. 03, 2003
Filed:
May. 11, 2001
Applicant:
Inventor:
Yasunori Miyazaki, Tokyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F 1/00 ; G02F 1/03 ; H01L 3/1072 ; H01S 5/00 ;
U.S. Cl.
CPC ...
G02F 1/00 ; G02F 1/03 ; H01L 3/1072 ; H01S 5/00 ;
Abstract
An optical modulator which is suitable for use in high-speed optical communications and simultaneously satisfies demands for incident light of higher intensity and lower chirp. An absorption layer having a multi-quantum-well structure includes a well layer having a first bandgap energy, and a barrier layer having a second bandgap energy, the second bandgap energy being greater than the first bandgap energy and no less than 0.946 eV.