Title:
OPTICAL TRANSMISSION DEVICE AND SPECTRUM CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2019/044604
Kind Code:
A1
Abstract:
[Problem] To provide an optical transmission device capable of controlling the spectrum shape of a wavelength multiplexed signal and improving the transmission quality. [Solution] A light transmission device is configured to include a wavelength selecting means 1, an optical amplifying means 2, a measuring means 3, a setting means 4, and a control means 5. The wavelength selecting means 1 has a means for selecting an optical signal, and a means for outputting a signal after adjusting the signal level. The optical amplifying means 2 amplifies the wavelength multiplexed signal having the adjusted signal level. The measuring means 3 measures the spectrum of the amplified wavelength multiplexed signal. The setting means 4 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 5 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 1. In addition, the wavelength selecting means 1 adjusts the signal level on the basis of the determined attenuation amount.
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Inventors:
ASADA HIDEO (JP)
Application Number:
PCT/JP2018/030923
Publication Date:
March 07, 2019
Filing Date:
August 22, 2018
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
H04B10/294; H04J14/02
Domestic Patent References:
| WO2010105687A1 | 2010-09-23 |
Foreign References:
| US20170117983A1 | 2017-04-27 | |||
| JP2016208519A | 2016-12-08 | |||
| JP6067192B1 | 2017-01-25 | |||
| JP2014192615A | 2014-10-06 | |||
| JP2017164182A | 2017-09-21 |
Other References:
See also references of EP 3678304A4
Attorney, Agent or Firm:
SHIMOSAKA Naoki (JP)
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