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:
Dec. 27, 2005
Filed:
May. 29, 2003
Applicants:
Yukiko Ikarashi, Kawasaki, JP;
Masayuki Kato, Kawasaki, JP;
Koji Tsukamoto, Kawasaki, JP;
Inventors:
Assignee:
Fujitsu Limited, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B006/26 ; G02B006/42 ;
U.S. Cl.
CPC ...
Abstract
A first optical waveguide having at least a core layer with a refractive index ncj and a second optical waveguide having at least a core layer with a refractive index nck are arranged to oppose their end surfaces, and at least any one end surface of the first optical waveguide and the second optical waveguide is formed by the etching, and the end surface formed by the etching is covered with a coating medium with a refractive index nij or nik that is equal to a refractive index ncj or nck of the core layer that is exposed from the end surface.