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:
Sep. 24, 2019
Filed:
Jan. 09, 2018
Nec Corporation, Tokyo, JP;
Morio Takahashi, Tokyo, JP;
NEC CORPORATION, Minato-ku, Tokyo, JP;
Abstract
An optical waveguide device includes first and second branching devices and first to fourth distribution optical waveguides that are formed on an optical waveguide substrate including a latticed dummy pattern of a predetermined pitch and that are arranged, in a region where the dummy pattern is removed, so as to be separated from the dummy pattern, and an interval between the first and second distribution optical waveguides at an output point of the first branching device is equal to an interval between the third and fourth distribution optical waveguides at an output point of the second branching device, and a distance between light propagation centers of the first and second branching devices is an integer multiple of the pitch, and at a point where a distance between neighboring distribution optical waveguides becomes maximum, the distance between the neighboring distribution optical waveguides is an integer multiple of the pitch.