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Title:
CABLE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/090644
Kind Code:
A1
Abstract:
The purpose of the present invention is to apply an optical amplification relay device to fiber optic sensing to lengthen a sensing range, as well as to enable compatibility with an optical communication system. Provided is a cable system that uses a cable comprising a plurality of fiber optic core wires for fiber optic communication and fiber optic sensing of the environment surrounding the cable, wherein: the fiber optic communication is bidirectional communication using fiber optic core wire pairs which are pairs of the fiber optic core wires; in the fiber optic core wires, a first wavelength band, which is the wavelength for a communication optical signal, and a second wavelength band, which is the wavelength for probe light and backscattering light, are different from each other; an optical amplification part provided to the optical amplification relay device comprises a first amplification part and a second amplification part which amplify light in mutually opposing orientations; and any of the communication optical signal, the probe light, and the backscattering light are amplified by at least one of the first amplification part and the second amplification part.

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Inventors:
YANO YUTAKA (JP)
Application Number:
PCT/JP2020/038490
Publication Date:
May 14, 2021
Filing Date:
October 12, 2020
Export Citation:
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Assignee:
NEC CORP (JP)
International Classes:
G01D5/353; H04B10/80
Domestic Patent References:
WO2008105202A12008-09-04
Foreign References:
JP2006208279A2006-08-10
JPH045529A1992-01-09
JP2007040738A2007-02-15
JPH02189507A1990-07-25
JP2712103B21998-02-10
JPS63113323A1988-05-18
JP2014165858A2014-09-08
JP2010200361A2010-09-09
US20180080812A12018-03-22
US20180164526A12018-06-14
Attorney, Agent or Firm:
SHIMOSAKA Naoki et al. (JP)
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