Title:
OPTICAL CROSS-CONNECT DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/230561
Kind Code:
A1
Abstract:
[Problem] To improve an Add/Drop ratio while suppressing the device scale of an ROADM. [Solution] Provided is an ROADM equipped with a wavelength cross-connect unit connected to a plurality of paths; and a transponder housing function unit for relaying an optical signal from the wavelength cross-connect unit to respective transponders, wherein the transponder housing function unit is configured by cascade-connecting, in a plurality of stages, elements E that are wavelength-selective switches each provided with one input port that receives the optical signal from the direction of the wavelength cross-connect unit, and a plurality of output ports that each transmit the optical signal toward the respective transponders, and a plurality of elements E to which the optical signal is propagated from the same path of the wavelength cross-connect unit, and which are located in the same stage of the cascade connection are multiplexed as one module.
Inventors:
KAWAHARA HIROKI (JP)
YAMAMOTO HIROSHI (JP)
ARAYA KATSUHIRO (JP)
UEMATSU YOSHIHIKO (JP)
OKA TOSHIYUKI (JP)
YAMAMOTO HIROSHI (JP)
ARAYA KATSUHIRO (JP)
UEMATSU YOSHIHIKO (JP)
OKA TOSHIYUKI (JP)
Application Number:
PCT/JP2019/020498
Publication Date:
December 05, 2019
Filing Date:
May 23, 2019
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04J14/02; G02F1/31; H04B10/27; H04Q3/52
Foreign References:
| US20070286605A1 | 2007-12-13 | |||
| JP2016225850A | 2016-12-28 | |||
| JP2017157982A | 2017-09-07 |
Other References:
SUZUKI, K. ET AL.: "Application of waveguide/free- space optics hybrid to ROADM device", JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 35, no. 4, 15 February 2017 (2017-02-15), pages 596 - 606, XP055636351, DOI: 10.1109/JLT.2016.2599182
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P.C. (JP)
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