Title:
OPTICAL RECEPTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/230513
Kind Code:
A1
Abstract:
[Problem] To make it possible to obtain a high-quality signal component by canceling beat noise in a WDM signal, and implement this configuration at low implementation cost. [Solution] This optical reception device converts a WDM signal rs(t) of an optical signal into electrical signals d(t)1-d(t)n represented by quadrature phase complex numbers, and obtains signals D1-Dn of a transmission source by cancelling beat noise from the electrical signals and thereafter modulating the electrical signals. The optical reception device is configured to be provided with: absolute value operation units 31a-31n which each generate a signal component including a beat noise component by absolute value square operation processing for squaring the absolute value of the electrical signal; scaling units 32a-32n which each restore n types of wavelength-related beat noise in the electrical signal by multiplying the generated beat noise component by a proportionality constant; and subtraction units 33a-32n which each cancel the n types of beat noise included in the electrical signal by subtracting the restored n-types of beat noise from the electrical signal.
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/JP2019/020215
Publication Date:
December 05, 2019
Filing Date:
May 22, 2019
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04B10/61
Foreign References:
| JP2014511058A | 2014-05-01 | |||
| JP2013162137A | 2013-08-19 |
Other References:
ZHANG, B. ET AL.: "Towards full band colorless reception with coherent balanced receivers", OPTICS EXPRESS, vol. 20, no. 9, April 2012 (2012-04-01), pages 10339 - 10352, XP055665282
EMMERICH, R. ET AL.: "Colorless C-band WDM system enabled by coherent reception of 56-GBd PDM-16QAM using an high-bandwidth ICR with TIAs", OFC 2017, March 2017 (2017-03-01), XP033100796
KAWAHARA, H., PROCEEDINGS OF THE 2018 IEICE GENERAL CONFERENCE
EMMERICH, R. ET AL.: "Colorless C-band WDM system enabled by coherent reception of 56-GBd PDM-16QAM using an high-bandwidth ICR with TIAs", OFC 2017, March 2017 (2017-03-01), XP033100796
KAWAHARA, H., PROCEEDINGS OF THE 2018 IEICE GENERAL CONFERENCE
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P.C. (JP)
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