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:
Apr. 28, 2015
Filed:
Sep. 26, 2011
Keiichi Morita, Yokohama, JP;
Kazumi Shimizu, Yokohama, JP;
Kenya Suzuki, Yokohama, JP;
Koji Kawashima, Yokohama, JP;
Keiichi Morita, Yokohama, JP;
Kazumi Shimizu, Yokohama, JP;
Kenya Suzuki, Yokohama, JP;
Koji Kawashima, Yokohama, JP;
NTT Electronics Corporation, Kanagawa, JP;
Abstract
An optical waveguide provided with a slab waveguide, which has a plurality of phase gratings arranged at a distance from each other in a direction substantially parallel to a light propagation direction and diffracting propagated light and a plurality of interference regions arranged alternately to the plurality of phase gratings in the direction substantially parallel to the light propagation direction and interfering the light diffracted by the plurality of phase gratings, and an arrayed waveguide whose end is connected to an end of the slab waveguide at a position of a constructive interference portion of a self-image formed by the plurality of phase gratings as an integrated phase grating.