OPTICAL COMMUNICATION SYSTEM AND OPTICAL COMMUNICATION METHOD

WIPO Patent Application WO/2020/250305

A1

An optical communication system according to the invention comprises a first optical communication device and a second optical communication device that transmit and receive optical signals via an optical transport line. The optical transport line comprises: a first sectional optical transport line connected to the first optical communication device; and a second sectional optical transport line connected to the second optical communication device and having less reflection points of optical signals than the first sectional optical transport line. The optical communication system is provided with: a light source; a launching unit that launches an excitation light outputted from the light source into the second sectional optical transport line, thereby subjecting the optical signal to a distributed Raman amplification; and a separating unit that separates the excitation light launched by the launching unit and transported through the second sectional optical transport line toward the first sectional optical transport line.

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

PCT/JP2019/023105

December 17, 2020

June 11, 2019

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NIPPON TELEGRAPH & TELEPHONE (JP)

H04B10/272; H04B10/291

JP2001060921A	2001-03-06
JP2007208747A	2007-08-16
JP2011147024A	2011-07-28
JPH11215171A	1999-08-06
JPH0325985A	1991-02-04
JPH03166782A	1991-07-18
JPH09179152A	1997-07-11

DEREK NESSET; PAUL WRIGHT: "Raman extended GPON using 1240 nm semiconductor quantum-dot lasers", 2010 CONFERENCE ON OPTICAL FIBER COMMUNICATION (OFC/NFOEC, 2010, pages 1 - 3, XP031676975

SHIGA INTERNATIONAL PATENT OFFICE (JP)

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