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:
Mar. 30, 2021
Filed:
Aug. 22, 2018
Nec Corporation, Tokyo, JP;
Hideo Asada, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
The function of each component of an optical transmission device is as follows. The wavelength selecting means has a means for selecting an optical signal, and a means for outputting a signal after adjusting the signal level. The optical amplifying means amplifies the wavelength multiplexed signal having the adjusted signal level. The measuring means measures the spectrum of the amplified wavelength multiplexed signal. The setting means sets a spectrum shape, which serves as a reference of the wavelength multiplexed signal to be outputted to the transmission line, as output spectrum setting information. The control means compares the measured spectrum with the output spectrum setting information and determines the attenuation amount when adjusting the signal level for each wavelength of the wavelength multiplexed signal in the wavelength selecting means. The wavelength selecting means adjusts the signal level on the basis of the determined attenuation amount.