Title:
OPTICAL ADD/DROP MULTIPLEXING DEVICE AND OPTICAL ADD/DROP MULTIPLEXING METHOD
Document Type and Number:
WIPO Patent Application WO/2017/022231
Kind Code:
A1
Abstract:
In order to improve the reliability of a reconfigurable optical add/drop multiplexing (ROADM) device, provided is an optical add/drop multiplexing device that comprises the following: a first wavelength selection unit and a second wavelength selection unit that can select and output an optical signal of a prescribed wavelength from among inputted optical signals; a first branching unit that selectively outputs a first signal being an optical signal that has been inputted from a first terminal station on a main route to the first wavelength selection unit and the second wavelength selection unit; a second branching unit that selectively outputs a second signal being an optical signal that has been inputted from a second terminal station on a sub-route to the first wavelength selection unit and the second wavelength selection unit; and a first output unit that can selectively output to the second terminal station, as a third signal, either the optical signal outputted by the first wavelength selection unit on the basis of the first signal and the second signal, or the optical signal outputted by the second wavelength selection unit on the basis of the first signal and the second signal.
Inventors:
TAKIGAWA YOSHINARI (JP)
Application Number:
PCT/JP2016/003532
Publication Date:
February 09, 2017
Filing Date:
August 01, 2016
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
H04B10/03; H04B10/27; H04J14/00; H04J14/02
Domestic Patent References:
| WO2013183146A1 | 2013-12-12 |
Other References:
SIMMONS M.JANE ET AL.: "Analysis of internal ROADM protection", 2015 36TH IEEE SARNOFF SYMPOSIUM, 20 September 2015 (2015-09-20), pages 66 - 69, XP032808492
YUZO ISHII ET AL.: "ROADM o Kokinoka suru WSS Module Gijutsu", NTT GIJUTSU JOURNAL, vol. 25, no. 11, November 2013 (2013-11-01), pages 21 - 24, XP055459114, Retrieved from the Internet [retrieved on 20160812]
See also references of EP 3334062A4
YUZO ISHII ET AL.: "ROADM o Kokinoka suru WSS Module Gijutsu", NTT GIJUTSU JOURNAL, vol. 25, no. 11, November 2013 (2013-11-01), pages 21 - 24, XP055459114, Retrieved from the Internet
See also references of EP 3334062A4
Attorney, Agent or Firm:
SHIMOSAKA, Naoki (JP)
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