Title:
OPTICAL MULTIPLEXER/DEMULTIPLEXER, OPTICAL SUBMARINE CABLE SYSTEM, OPTICAL MULTIPLEXING/DEMULTIPLEXING METHOD, AND NON-TRANSITORY COMPUTER READABLE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2020/179182
Kind Code:
A1
Abstract:
The present invention suppresses the deterioration of optical signal characteristics even when the noise level of the optical signal delivered to an opposite station is high. The optical multiplexer/demultiplexer (20) according to this mode is provided with: an OCM (1) which measures the strength of the optical signals in each of multiple wavelength bands inputted to a WSS (2) and, on the basis of the measured intensities, determines an optical signal wavelength band and a noise wavelength band; the WSS (2) which, as a primary signal, passes the optical signal in the optical signal wavelength band determined by the OCM (1); a dummy light generation unit (3) which generates dummy light in which the optical signal wavelength band has been extinguished; and an optical coupler (4) which multiplexes the primary signal outputted from the WSS (2) and the dummy signal, and outputs this as a wavelength-division multiplexed optical signal to the optical transmission path.
Inventors:
INOUE TAKANORI (JP)
Application Number:
PCT/JP2019/049164
Publication Date:
September 10, 2020
Filing Date:
December 16, 2019
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
H04J14/02
Domestic Patent References:
| WO2016139933A1 | 2016-09-09 | |||
| WO2017154454A1 | 2017-09-14 | |||
| WO2015145985A1 | 2015-10-01 | |||
| WO2017154454A1 | 2017-09-14 |
Foreign References:
| JP2018164278A | 2018-10-18 | |||
| JP2005051598A | 2005-02-24 | |||
| JP2006005639A | 2006-01-05 | |||
| JP2014187671A | 2014-10-02 | |||
| JP2019038360A | 2019-03-14 |
Other References:
See also references of EP 3917044A4
Attorney, Agent or Firm:
IEIRI Takeshi (JP)
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