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:
Oct. 20, 2026
Filed:
Oct. 28, 2021
Nec Corporation, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
An OLT, a plurality of ONUs, an optical fiber connected to the OLT, a plurality of optical fibers connected to each of the plurality of ONUs, an optical output unit configured to output pulsed light to the optical fiber, a plurality of reflection units provided in each of the plurality of optical fibers, a branching unit configured to connect the optical fiber and each of the plurality of optical fibers, an optical input unit configured to receive the reflected light from the optical fiber, and a detection unit configured to analyze a pattern of the reflected light to detect a failure of the optical fiber provided with the reflection unit that has output the reflected light are provided, in which each of the plurality of reflection units can individually switch execution of reflection of the pulsed light.
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