Title:
OPTICAL RECEIVER
Document Type and Number:
WIPO Patent Application WO/2020/110778
Kind Code:
A1
Abstract:
[Problem] To miniaturize this optical receiver using a polarization demultiplexing technology. [Solution] An optical receiver 100A, which receives a polarization multiplexed signal in which two optical signals are orthogonally polarization multiplexed, is provided with: an IL1 which branches the polarization multiplexed signal into two transmission signals that become asymmetric with respect to optical transmission characteristics; O/Es 2a, 2b which convert the branched transmission signals into electrical signals; a down sampler 3 which down-samples the converted electric signals and generates low speed digital signals; a calculator 4 which calculates coefficients of a polarization demultiplexing matrix from the generated low-speed digital signals; a level adjustor 5A which adjusts the signal levels of the converted electrical signals according to the calculated coefficients and generates a plurality of adjustment signals; adders 6Aa, 6Ab which add the generated adjustment signals and generate addition signals; and identifiers 7a, 7b which recover and extract two optical signals from the generated addition signals.
Inventors:
MATSUDA TOSHIYA (JP)
MASUMOTO KANA (JP)
MATSUMURA KAZUYUKI (JP)
MASUMOTO KANA (JP)
MATSUMURA KAZUYUKI (JP)
Application Number:
PCT/JP2019/044878
Publication Date:
June 04, 2020
Filing Date:
November 15, 2019
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04J14/06; H04B10/66
Domestic Patent References:
| WO2018079598A1 | 2018-05-03 | |||
| WO2019004040A1 | 2019-01-03 |
Foreign References:
| US20100266282A1 | 2010-10-21 | |||
| JP2018519732A | 2018-07-19 |
Other References:
KIKUCHI KAZURO: "Electronic polarization-division demultiplexing based on digital signal processing in intensity-modulation direct-detection optical communication systems", OPTICS EXPRESS, vol. 22, no. 2, 2014, pages 1971 - 1980, XP055247115, Retrieved from the Internet DOI: 10.1364/OE.22.001971
MATSUDA, TOSHIYA ET AL.: "Dual-Polarization Intensity-Modulated Signal Transmission with Direct-Detection by Using Asymmetrical Polarization Synthesis", 2018 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC, 23 September 2018 (2018-09-23), pages 1 - 3, XP033447644, DOI: 10.1109/ECOC.2018.8535363
MATSUDA, TOSHIYA ET AL.: "Polarization Multiplexing and Demultiplexing Technique for Large Capacity Small Optical Module by using Optical Interleaver", 2018 IEEE PHOTONICS CONFERENCE (IPC, 30 September 2018 (2018-09-30), pages 1 - 2, XP033442259, DOI: 10.1109/IPCon.2018.8527254
MATSUDA, TOSHIYA ET AL.: "Dual-Polarization Intensity-Modulated Signal Transmission with Direct-Detection by Using Asymmetrical Polarization Synthesis", 2018 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC, 23 September 2018 (2018-09-23), pages 1 - 3, XP033447644, DOI: 10.1109/ECOC.2018.8535363
MATSUDA, TOSHIYA ET AL.: "Polarization Multiplexing and Demultiplexing Technique for Large Capacity Small Optical Module by using Optical Interleaver", 2018 IEEE PHOTONICS CONFERENCE (IPC, 30 September 2018 (2018-09-30), pages 1 - 2, XP033442259, DOI: 10.1109/IPCon.2018.8527254
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P.C. (JP)
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