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:
Nov. 24, 2015
Filed:
Dec. 25, 2012
Sumitomo Electric Industries, Ltd., Osaka-shi, JP;
Yasunori Murakami, Yokohama, JP;
Tomoyuki Funada, Osaka, JP;
Sumitomo Electric Industries, Ltd., Osaka-shi, JP;
Abstract
An optical branching/synthesizing deviceA includes an optical branching coupler groupA and an optical combiner. The optical branching coupler groupA includes a first-stage optical branching couplerthat receives a downstream optical signal Sd from an OLT deviceat light input/output end, and second-stage optical branching couplersandincluding light input/output endsandconnected to light input/output endsandof the optical branching couplerat the previous stage, respectively. A light input/output endsof the optical branching couplersandtransmit the downstream optical signal Sd to each ONU deviceand receive upstream optical signals Su from the ONU devices. The optical combiner combines the upstream optical signals Su output from the light input/output ends, andof the optical branching couplersto