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:
Jan. 07, 2025
Filed:
Mar. 22, 2022
Applicant:
Fujitsu Optical Components Limited, Kawasaki, JP;
Inventor:
Kensuke Ogawa, Meguro, JP;
Assignee:
FUJITSU OPTICAL COMPONENTS LIMITED, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/00 (2006.01); G02F 1/015 (2006.01); G02F 1/025 (2006.01);
U.S. Cl.
CPC ...
G02F 1/025 (2013.01); G02F 1/0081 (2013.01); G02F 1/015 (2013.01); G02F 1/0152 (2021.01); G02F 2201/063 (2013.01); G02F 2203/50 (2013.01);
Abstract
An optical modulation elementincludes a rib type optical waveguide that includes a rib portionthat has a P-N junction, a P-type slab areathat continuously extends from a P type area of the rib portion, and an N-type slab areathat continuously extends from an N type area of the rib portion. A first thin filmis formed on the P-type slab areaand is made of a material having an electron affinity that is different from that of the P-type slab area