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. 31, 2006
Filed:
Jul. 14, 2005
Shinji Maruyama, Yokohama, JP;
Norihisa Naganuma, Yokohama, JP;
Shinji Maruyama, Yokohama, JP;
Norihisa Naganuma, Yokohama, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
In an optical switch device: output waveguides are arranged with such a pitch as to realize a split wavelength gap equal to or smaller than half of a gap between operating wavelengths of optical signals; at least two input waveguides are arranged with the same pitch; at least one slab waveguide spreads light from the input waveguides to be outputted to a grating element, condenses first light from the grating element to be outputted into the input waveguides, condenses second light from the grating element for each wavelength to be outputted into the output waveguides, and spreads light from the output waveguides to be outputted to the grating element; and the optical switch unit selects signals at an identical wavelength in adjacent output waveguides, and performs 2×2 switching of the signals so as to output the signals from the input waveguides.