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. 17, 2021
Filed:
Feb. 21, 2019
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
An OLT () includes one or more optical receivers () configured to receive optical signals of respective different wavelengths obtained by an AWG filter () demultiplexing a wavelength-multiplexed signal addressed to the terminal itself, and a supervisory controller () configured to transmit, to an ONU (), a wavelength adjustment instruction to transit a wavelength to be used by an optical transmitter () for transmission of an optical signal, to set a difference between an optical received power of an optical signal received by any of the optical receivers () and a reference value of the optical received power within a threshold, the ONU () being a transmission source of the optical signal.