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:
May. 02, 2006
Filed:
Sep. 16, 2003
Applicants:
Takashi Matsuoka, Tokyo, JP;
Hideki Fukano, Tokyo, JP;
Inventors:
Takashi Matsuoka, Tokyo, JP;
Hideki Fukano, Tokyo, JP;
Assignee:
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S 3/10 (2006.01); H01S 5/00 (2006.01); H01S 5/20 (2006.01); H01S 5/323 (2006.01); G02B 26/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a semiconductor optical modulator of this invention, each quantum-well layer and each barrier layer of a quantum-well structure serving as a light absorption layer are respectively made of InGaAlN (0≦X, Y≦1, 0≦X+Y≦1) and InGaAlN (0≦X', Y′≦1, 0≦X′+Y′≦1). An electric field is being generated in the light absorption layer by spontaneous polarization.