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. 30, 2006
Filed:
Mar. 31, 2005
Terukazu Naruse, Atsugi, JP;
Terukazu Naruse, Atsugi, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An optical multiplexer/demultiplexer uses a diffraction grating, capable of multiplexing/demultiplexing lights of narrow wavelength spacing at a short focal distance. To this end, a plurality of output waveguide groups is connected to one end face of a slab waveguide to which an input waveguide group is connected. A diffraction grating in which grating grooves, each including a plurality of reflection planes blazed corresponding to respective arrangement directions of the plurality of output waveguide groups are formed, is disposed on the other end face of the slab waveguide. The arrangements of the respective output waveguide groups are determined, so that diffracted lights of wavelengths different from each other, which are reflected by the reflection planes of the diffraction grating, respectively reach the output waveguides of the plurality of output waveguide groups.