OPTICAL RECEPTION DEVICE, OPTICAL TRANSMISSION SYSTEM, OPTICAL TRANSMISSION METHOD, AND COMPUTER PROGRAM

WIPO Patent Application WO/2021/001871

A1

This optical reception device is provided with: a local light transmission unit that generates local light of a plurality of different wavelengths, selects, from the generated local light of the plurality of different wavelengths, local light of a wavelength similar to a wavelength of a received optical signal, and transmits the selected local light to a coherent receiver; a demultiplexing unit that demultiplexes the received optical signal, and transmits the demultiplexed optical signal to the coherent receiver via a first path; and a wavelength detection unit that receives input of the optical signal demultiplexed by the demultiplexing unit via a second path, divides the inputted optical signal into paths that differ for each wavelength by a wavelength multiplexer/demultiplexer, and outputs, to the local light transmission unit, a control signal that causes local light of a wavelength of the path including the optical signal to be output.

IGARASHI RYO (JP)
KANAI TAKUYA (JP)
FUJIWARA MASAMICHI (JP)
KANI JUNICHI (JP)

PCT/JP2019/026036

January 07, 2021

July 01, 2019

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NIPPON TELEGRAPH & TELEPHONE (JP)

H04B10/61

JP2014187622A	2014-10-02
JPH0870293A	1996-03-12
JP2011160146A	2011-08-18
JP2014050002A	2014-03-17

KOMA R. ET AL.: "Wide Range Carrier Frequency Offset Estimation Method using Training Symbols with Asymmetric Constellations for Burst-Mode Coherent Reception", 2018 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXPOSITION (OFC), 11 March 2018 (2018-03-11) - 15 March 2018 (2018-03-15), pages 1 - 3, XP033357315

SHIGA INTERNATIONAL PATENT OFFICE (JP)

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