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:
Aug. 30, 1994
Filed:
Jul. 13, 1993
Applicant:
Inventors:
Takeshi Ota, Kanagawa, JP;
Mitsuzo Arii, Tokyo, JP;
Masukazu Hirata, Tokyo, JP;
Yasunari Kawabata, Tokyo, JP;
Assignees:
Fuji Xerox Co., Ltd., Tokyo, JP;
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
385 46 ; 385 14 ;
Abstract
A multi-terminal star coupler having a circuit constituted by optical waveguides integrated on a substrate. For example, in a four-terminal star coupler, four uniformly three-dividing optical couplers are provided for branching from any one terminal to the other three terminals, and an optical waveguide from any one terminal to another terminal not adjacent to the one terminal includes an intersection portion where the optical waveguide intersects another optical waveguide lead from another terminal adjacent to the one terminal.