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:
Mar. 21, 2006
Filed:
Oct. 27, 2003
Michiko Takushima, Yokohama, JP;
Tomomi Sano, Yokohama, JP;
Michiko Takushima, Yokohama, JP;
Tomomi Sano, Yokohama, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
An optical signal processor comprises fiber collimators, a first diffraction grating device, a second diffraction grating device, a first half-wave plate, and a second half-wave plate. Each of the diffraction grating devices is of reflection type having a diffracting surface parallel to a yz plane and a grating direction parallel to a z axis. The diffraction grating device diffracts the light outputted from the fiber collimator after collimation. The diffraction grating device diffracts the light diffracted by the diffraction grating device. The half-wave plates having respective optic axes in directions different from each other by 45 degrees are bonded together and are disposed on an optical path between the diffraction grating devices.