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. 10, 2008
Filed:
Sep. 05, 2003
Haruhiko Tabuchi, Sagamihara, JP;
Terukazu Naruse, Atsugi, JP;
Koji Terada, Atsugi, JP;
Kohei Shibata, Isehara, JP;
Haruhiko Tabuchi, Sagamihara, JP;
Terukazu Naruse, Atsugi, JP;
Koji Terada, Atsugi, JP;
Kohei Shibata, Isehara, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An optical device used, for example, in an add/drop multiplexer, a dynamic gain equalizer or a optical power monitor. The optical device includes (a) a substrate; (b) a first slab waveguide formed on the substrate; (c) channel waveguides of differing lengths formed on the substrate, light output from the first slab waveguide being input to the channel waveguides; and (d) a second slab waveguide formed on the substrate, light output from the channel waveguides being input to the second slab waveguide. An end face of the second slab waveguide shares a face with an end face of the substrate. The optical device has low loss characteristics.