OPTICAL TRANSMISSION DEVICE, TERMINAL DEVICE, OPTICAL COMMUNICATION SYSTEM, AND OPTICAL COMMUNICATION METHOD

WIPO Patent Application WO/2020/121716

A1

The present invention makes it possible to flexibly control rays of dummy light included in a wavelength division multiplexed optical signal and suppress signal quality degradation. An optical signal adjustment unit (1) is configured to be capable of receiving an input of a plurality of optical signals of different wavelengths, and adjusts the strengths of each of the plurality of optical signals on the basis of strength fluctuations in a transmission path and outputs same. A dummy light output unit (2) outputs a plurality of rays of dummy light (D) of different wavelengths at strengths based on strength fluctuations in the transmission path. A control unit (4) specifies the rays of dummy light which correspond to each of the optical signals, and controls the strengths of the specified rays of dummy light on the basis of the strengths of the optical signals which are outputted from the optical signal adjustment unit (1) and which correspond to the specified rays of dummy light. A combiner unit (3) outputs a wavelength division multiplexed optical signal (L) in which the rays of dummy light (D) are combined with an optical signal (L10) outputted from the optical signal adjustment unit.

OOTAKI KAZUHIRO (JP)

PCT/JP2019/044433

June 18, 2020

November 12, 2019

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NEC CORP (JP)

H04J14/02; H04B10/564

WO2018065327A1

2018-04-12

JP2002051013A	2002-02-15
JP2002033702A	2002-01-31
JP2003143113A	2003-05-16
US20130058647A1	2013-03-07
US20080310858A1	2008-12-18
JP2005051598A	2005-02-24
JP2014187671A	2014-10-02
JP2018232610A	2018-12-12

See also references of EP 3896875A4

IEIRI Takeshi (JP)

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