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Title:
LIGHT AMPLIFICATION DEVICE AND LIGHT AMPLIFICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2019/065354
Kind Code:
A1
Abstract:
[Problem] To provide a light amplification device with which it is possible to minimize the level deviation between wavelengths in a broadband optical wavelength multiplexed signal. [Solution] The light amplification device 1 according to the present embodiment is provided with a de-multiplexing unit 2, a first optical amplifier 3, a second optical amplifier 4, and a multiplexing unit 5. The de-multiplexing unit 2 de-multiplexes an inputted optical wavelength multiplexed signal into a first optical wavelength multiplexed signal having a first wavelength band and a second optical wavelength multiplexed signal having a second wavelength band in a longer wavelength band than the first wavelength band. The first optical amplifier 3 amplifies the first optical wavelength multiplexed signal. The second optical amplifier 4 amplifies the second optical wavelength multiplexed signal. The multiplexer 5 multiplexes the amplified first optical wavelength multiplexed signal and the amplified second optical wavelength multiplexed signal and outputs the multiplexed signal to a Raman amplifier 6. The first optical amplifier 3 adjusts the amplification rate of the first optical wavelength multiplexed signal so that the intensity of light in the second wavelength band is compensated by the Raman effect in the Raman amplifier 6.

Inventors:
INADA YOSHIHISA (JP)
Application Number:
PCT/JP2018/034387
Publication Date:
April 04, 2019
Filing Date:
September 18, 2018
Export Citation:
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Assignee:
NEC CORP (JP)
International Classes:
H01S3/10; G02F1/35; H04B10/294; H04J14/02
Domestic Patent References:
WO2002080408A12002-10-10
WO2004075363A12004-09-02
WO2001065740A12001-09-07
Foreign References:
JP2001053686A2001-02-23
US20160211643A12016-07-21
JP2007006500A2007-01-11
JP2002368692A2002-12-20
JP2002368691A2002-12-20
JPH08278523A1996-10-22
JP2001102666A2001-04-13
JP2005019501A2005-01-20
JP2015119235A2015-06-25
JP2017189425A2017-10-19
Other References:
See also references of EP 3691058A4
Attorney, Agent or Firm:
SHIMOSAKA Naoki (JP)
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