Title:
OPTICAL TRANSMISSION DEVICE, OPTICAL COMMUNICATION SYSTEM, AND OPTICAL SIGNAL TRANSMISSION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/049791
Kind Code:
A1
Abstract:
This optical transmission device carries out wavelength filtering of an optical signal while preventing filtering-related constriction. A branching unit (1) branches a wavelength-multiplexed optical signal (SIN) including an optical signal having a first wavelength into an optical signal (S1) and an optical signal (S2). A wavelength selection unit (12) blocks, within the optical signal (S1), an optical signal in a first wavelength band including the first wavelength. A filter unit (13) transmits, within the optical signal (S2), an optical signal (ST) in a second wavelength band including the first wavelength. A multiplexing unit (14) multiplexes and outputs the optical signal (ST) and an optical signal having the second wavelength. The second wavelength band is wider than the first wavelength band.
Inventors:
SATOU YOSHIROU (JP)
Application Number:
PCT/JP2019/017694
Publication Date:
March 12, 2020
Filing Date:
April 25, 2019
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
H04J14/02; H04B10/27
Domestic Patent References:
| WO2012094578A1 | 2012-07-12 | |||
| WO2017150278A1 | 2017-09-08 |
Foreign References:
| JP2012527189A | 2012-11-01 | |||
| JP2016010040A | 2016-01-18 | |||
| JP2016220128A | 2016-12-22 | |||
| US20120195592A1 | 2012-08-02 | |||
| JP2016131273A | 2016-07-21 | |||
| JP2018168150A | 2018-11-01 |
Other References:
See also references of EP 3849114A4
Attorney, Agent or Firm:
IEIRI Takeshi (JP)
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