Title:
TECHNOLOGY FOR OPTICAL MODULATOR EVALUATION ON BASIS OF PHASE RECOVERY
Document Type and Number:
WIPO Patent Application WO/2021/187177
Kind Code:
A1
Abstract:
[Problem] To provide a system for estimating the power–optical response imbalance between an in-phase (I) channel and a quadrature-phase (Q) channel of an optical quadrature amplitude modulator (optical IQ modulator), using a simple device. [Solution] A system for estimating the power–optical response imbalance between an I channel and a Q channel of an optical IQ modulator, that has a photodetector (PD), an analog–digital converter (ADC) and an imbalance calculation unit that: estimates the power–optical response imbalance between an I channel and a Q channel of an optical quadrature amplitude modulator (optical IQ modulator); has an input signal information reception unit that receives information pertaining to a first modulation signal and a strength information reception unit that receives strength information for digitized output signals from the ADC; and uses the information pertaining to the first modulation signal and the strength information from the digitized output signal and estimates the power–optical response imbalance between the I channel and the Q channel.
Inventors:
YOSHIDA YUKI (JP)
YAMAMOTO NAOKATSU (JP)
YAMAMOTO NAOKATSU (JP)
Application Number:
PCT/JP2021/008819
Publication Date:
September 23, 2021
Filing Date:
March 05, 2021
Export Citation:
Assignee:
NAT INST INF & COMM TECH (JP)
International Classes:
G01M11/00; G02F1/01
Domestic Patent References:
| WO2009113128A1 | 2009-09-17 |
Foreign References:
| JP2015516706A | 2015-06-11 | |||
| JP2002244091A | 2002-08-28 | |||
| US20190123832A1 | 2019-04-25 |
Other References:
FLUDGER C. R. S.; DUTHEL T.; HERMANN P.; KUPFER T.: "Low cost transmitter self-calibration of time delay and frequency response for high baud-rate QAM transceivers", 2017 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC), OSA, 19 March 2017 (2017-03-19), pages 1 - 3, XP033100907, DOI: 10.1364/OFC.2017.Th1D.3
DINIZ JULIO CESAR MEDEIROS; DA ROS FRANCESCO; DA SILVA EDSON PORTO; JONES RASMUS THOMAS; ZIBAR DARKO: "Optimization of DP-M-QAM Transmitter Using Cooperative Coevolutionary Genetic Algorithm", JOURNAL OF LIGHTWAVE TECHNOLOGY, IEEE, USA, vol. 36, no. 12, 15 June 2018 (2018-06-15), USA, pages 2450 - 2462, XP011680141, ISSN: 0733-8724, DOI: 10.1109/JLT.2018.2815347
YOSHIDA YUKI; UMEZAWA TOSHIMASA; KANNO ATSUSHI; YAMAMOTO NAOKATSU: "A Phase-Retrieving Coherent Receiver Based on Two-Dimensional Photodetector Array", JOURNAL OF LIGHTWAVE TECHNOLOGY, IEEE, USA, vol. 38, no. 1, 1 January 2020 (2020-01-01), USA, pages 90 - 100, XP011763698, ISSN: 0733-8724, DOI: 10.1109/JLT.2019.2947305
SAKAI, MANABU ET AL.: "Proceedings of 31st SIP Symposium", I/Q IMBALANCE ESTIMATION METHODS USING PREAMBLES IN OFDM/OQAM., 14 December 2016 (2016-12-14), pages 352 - 357
DINIZ JULIO CESAR MEDEIROS; DA ROS FRANCESCO; DA SILVA EDSON PORTO; JONES RASMUS THOMAS; ZIBAR DARKO: "Optimization of DP-M-QAM Transmitter Using Cooperative Coevolutionary Genetic Algorithm", JOURNAL OF LIGHTWAVE TECHNOLOGY, IEEE, USA, vol. 36, no. 12, 15 June 2018 (2018-06-15), USA, pages 2450 - 2462, XP011680141, ISSN: 0733-8724, DOI: 10.1109/JLT.2018.2815347
YOSHIDA YUKI; UMEZAWA TOSHIMASA; KANNO ATSUSHI; YAMAMOTO NAOKATSU: "A Phase-Retrieving Coherent Receiver Based on Two-Dimensional Photodetector Array", JOURNAL OF LIGHTWAVE TECHNOLOGY, IEEE, USA, vol. 38, no. 1, 1 January 2020 (2020-01-01), USA, pages 90 - 100, XP011763698, ISSN: 0733-8724, DOI: 10.1109/JLT.2019.2947305
SAKAI, MANABU ET AL.: "Proceedings of 31st SIP Symposium", I/Q IMBALANCE ESTIMATION METHODS USING PREAMBLES IN OFDM/OQAM., 14 December 2016 (2016-12-14), pages 352 - 357
Attorney, Agent or Firm:
HIROSE Takayuki (JP)
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