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Title:
OPTICAL COMMUNICATION DEVICE, AND DEVICE SUPPLYING EXCITATION LIGHT FOR OPTICAL AMPLIFICATION
Document Type and Number:
WIPO Patent Application WO/2018/097074
Kind Code:
A1
Abstract:
[Problem] To provide: a device that supplies, respectively to optical fiber amplifiers each corresponding to a plurality of wavelength bands, highly reliable excitation light for which wavelength dependency has been taken into consideration; and an optical communication device which uses said device. [Solution] An equal branching optical system (301), to which a first excitation light beam (P1) and a second excitation light beam (P2) are input, generates a plurality of equally branched light beams (P12). An unequal branching optical system (401), to which a third excitation light beam (Padd) is input, generates a plurality of unequally branched light beams (Pm, Pn). The equally branched light beams (P12) and the first unequally branched light beam (Pm) are input to a first equal branching coupler (302), which outputs output branched light beams (P12m) as excitation light for optical fiber amplifiers (100, 200) for a first wavelength band. The equally branched light beams (P12) and the second unequally branched light beam (Pn) are input to a second equal branching coupler (303), which outputs output branched light beams (P12n) as excitation light for optical fiber amplifiers (101, 201) for a second wavelength band.

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Inventors:
KAWAI MOTOYOSHI (JP)
Application Number:
PCT/JP2017/041586
Publication Date:
May 31, 2018
Filing Date:
November 20, 2017
Export Citation:
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Assignee:
NEC CORP (JP)
International Classes:
H01S3/10; H01S3/067; H04B10/294
Domestic Patent References:
WO2006085370A12006-08-17
Foreign References:
JP2006012979A2006-01-12
JP2004343121A2004-12-02
JPH08304860A1996-11-22
US20020167722A12002-11-14
US6049417A2000-04-11
JP2006012979A2006-01-12
JPH08304860A1996-11-22
JP2014072280A2014-04-21
JP2002319726A2002-10-31
JP2016229936A2016-11-28
Other References:
See also references of EP 3547469A4
Attorney, Agent or Firm:
SHIMOSAKA Naoki (JP)
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