Title:
OPTICAL BRANCHING/COUPLING DEVICE AND METHOD FOR CONTROLLING SAME
Document Type and Number:
WIPO Patent Application WO/2022/064913
Kind Code:
A1
Abstract:
In order to achieve an optical branching/coupling device having low laying cost and high reliability and a method for controlling the same, this branching/coupling device is provided with: first to third optical transmission paths, each inputting and outputting a wavelength-multiplexed optical signal; a first multi/demultiplexer that outputs a first optical signal to be outputted from the first optical transmission path on the basis of the wavelength-multiplexed optical signals inputted from the second and third optical transmission paths, outputs a second optical signal to be outputted from the second optical transmission path on the basis of the wavelength-multiplexed optical signals inputted from the first and third optical transmission paths, and outputs a third optical signal to be outputted from the third optical transmission path on the basis of the wavelength-multiplexed optical signals inputted from the first and second optical transmission paths; a second multi/demultiplexer that outputs one of the first to third optical signals on the basis of the wavelength-multiplexed signals inputted from the first to third optical transmission paths; an optical splitter that distributes the wavelength-multiplexed optical signals inputted from the first to third optical transmission paths to the first and second multi/demultiplexing means; and an optical switch that selects either the first to third optical signals generated in the first multi/demultiplexing means or the first to third optical signals generated in the second multi/demultiplexing means on the basis the respective output destinations, and outputs the selected optical signals to the output destinations.
Inventors:
KURAHASHI RYU (JP)
Application Number:
PCT/JP2021/030527
Publication Date:
March 31, 2022
Filing Date:
August 20, 2021
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
H04J14/02; H04B10/032
Domestic Patent References:
| WO2016017181A1 | 2016-02-04 | |||
| WO2018105506A1 | 2018-06-14 |
Foreign References:
| US10771179B1 | 2020-09-08 |
Other References:
SIMMONS JANE M.; SALEH ADEL A. M.: "Analysis of internal ROADM protection", 2015 36TH IEEE SARNOFF SYMPOSIUM, IEEE, 20 September 2015 (2015-09-20), pages 66 - 69, XP032808492, DOI: 10.1109/SARNOF.2015.7324645
Attorney, Agent or Firm:
KITAJIMA Hiroshi et al. (JP)
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