OPTICAL PROPAGATION SYSTEM, OPTICAL PROPAGATION METHOD, AND RELAY AMPLIFICATION DEVICE

WIPO Patent Application WO/2023/188027

A1

An optical propagation system comprising an optical transmitter, an optical receiver, and a relay amplification device for amplifying and relaying optical signals, wherein: the optical transmitter and the relay amplification device are connected by a first multi-core fiber; the optical receiver and the relay amplification device are connected by a second multi-core fiber; and the relay device is provided with a branch unit for branching optical signals propagated using the cores of the first multi-core fiber into a plurality of single-core fibers, a spectrum inversion unit for performing optical parametric amplification of the optical signals branched into the single-core fibers using excitation light and outputting phase-conjugated light of the optical signals generated through the optical parametric amplification, and a merging unit for merging the phase-conjugated light of the optical signals outputted from the spectrum inversion unit and outputting the merged light to the second multi-core fiber.　

HOSHI MEGUMI (JP)
SHIBAHARA KOKI (JP)
SHIMIZU SHIMPEI (JP)
MIYAMOTO YUTAKA (JP)

PCT/JP2022/015641

October 05, 2023

March 29, 2022

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NIPPON TELEGRAPH & TELEPHONE (JP)

H04B10/291

WO2019039590A1	2019-02-28
WO2020116013A1	2020-06-11
WO1998008138A1	1998-02-26

JP2020014113A	2020-01-23
US20170272163A1	2017-09-21
JP2015050670A	2015-03-16
JPH07301830A	1995-11-14

SHIGA INTERNATIONAL PATENT OFFICE (JP)

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