Title:
OPTICAL AMPLIFIER, OPTICAL RELAY, AND OPTICAL COMMUNICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/202737
Kind Code:
A1
Abstract:
Provided is an optical amplifier, an optical relay and an optical communication system that can amplify signal light of a plurality of systems and that can realize a reduction in costs. This optical amplifier amplifies and outputs signal light of a plurality of systems, the amplifier including: a plurality of impurity-doped optical fiber amplification units; a plurality of excitation light sources; a plurality of excitation light demultiplexing units that demultiplex excitation light from the plurality of excitation light sources; a plurality of excitation light multiplexing/demultiplexing units that multiplexes and demultiplexes the excitation light from the plurality of excitation light demultiplexing units; and a plurality of multiplexing units that multiplexes one of the plurality of signal light and the excitation light from the plurality of excitation light multiplexing/demultiplexing units and, then, inputs the multiplexed excitation light into one of the plurality of impurity-doped optical fiber amplification units. The number of the plurality of excitation light sources is less than the number of the plurality of impurity-doped optical fiber amplification units. The plurality of excitation light sources include at least a first excitation light source and a second excitation light source that are driven commonly by a first driving current, and a third excitation light source that is driven by a second driving current of a different system than the first driving current.
Inventors:
TAKEUCHI TAKESHI (JP)
Application Number:
PCT/JP2022/012953
Publication Date:
September 29, 2022
Filing Date:
March 22, 2022
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
H01S3/10; H01S3/067; H04B10/293; H04J14/02
Domestic Patent References:
| WO2020158532A1 | 2020-08-06 | |||
| WO2013121744A1 | 2013-08-22 | |||
| WO2018097075A1 | 2018-05-31 | |||
| WO2017056438A1 | 2017-04-06 |
Foreign References:
| DE19627156A1 | 1998-01-08 |
Attorney, Agent or Firm:
KITAJIMA Hiroshi et al. (JP)
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