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2016 Fiscal Year Research-status Report

Pump-Phase-Noise-Free Wavelength Conversion and Multicast for High-Order QAM Signals

Research Project

Project/Area Number 15K06033
Research InstitutionTokai University

Principal Investigator

呂 国偉  東海大学, 創造科学技術研究機構, 准教授 (30599709)

Co-Investigator(Kenkyū-buntansha) 坂本 高秀  国立研究開発法人情報通信研究機構, ネットワークシステム研究所ネットワーク基盤研究室, 主任研究員 (70392727)
千葉 明人  群馬大学, 大学院理工学府, 助教 (30435789)
Project Period (FY) 2015-04-01 – 2018-03-31
Keywords光デバイス・光回路
Outline of Annual Research Achievements

In the second year of this project, we have further developed the phase-noise-free wavelength conversion and multicast schemes for high-order modulation formats. Here we summarize the research achievement in the past year as below.
1)Pump-phase-noise-free wavelength conversion and multicast for multi-carrier high-order modulation formats: Last year we have experimentally demonstrated the phase-noise-free wavelength exchange, conversion and multicast for single-carrier high-order modulation formats, such as 16-ary quadrature amplitude modulation (QAM) and 64-QAM signals. In this year, we extended it to the phase-noise-free wavelength conversion and multicast for multi-carrier high-order modulation formats, such as coherent optical orthogonal frequency division multiplexing (CO-OFDM) with 16QAM modulations in subcarriers. Owing to the phase noise cancellation effect using coherent pumps, the common phase noise from pump could be effectively eliminated, showing high tolerance against the pump phase noise. The result has been published in top journal in the field, Optics Express.

2)Optical subcarrier processing using coherent pump for Nyquist subcarrier multiplexed (SCM) signals: We also have applied the coherent pumping scheme to process the subcarrier in SCM signals. It could be helpful to coherently combine two low-level subcarriers to high-order subcarrier in SCM signals. It will be helpful to provide flexibility in the granularity management in SCM systems.

Current Status of Research Progress
Current Status of Research Progress

1: Research has progressed more than it was originally planned.

Reason

This year, the work has been smoothly extended to the phase-noise-free wavelength conversion and multicast for multi-carrier high-order modulation formats, not only limited to single-carrier formats. The experiment has been successfully demonstrated to verify the proposed scheme. Besides, we have tried to apply the coherent pumping scheme to the optical processing for subcarriers in SCM systems.

Strategy for Future Research Activity

In the following stage of the project, we will try to demonstrate the phase-noise-free processing scheme based on promising nonlinear platform, for example, quantum-dot semiconductor optical amplifier (QD-SOA). Moreover, we will explore the application of coherent pumping in other processing schemes, such as phase-sensitive amplification.

Causes of Carryover

Due to the long delivery time, some of components could not be delivered on time. So we decided to move the budget to the next fiscal year.

Expenditure Plan for Carryover Budget

We will place order for the direct modulated laser, which has a lead time of around three months.

  • Research Products

    (9 results)

All 2017 2016

All Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 2 results,  Acknowledgement Compliant: 1 results) Presentation (7 results) (of which Int'l Joint Research: 7 results,  Invited: 1 results)

  • [Journal Article] Loop-assisted coherent matched detector for parallel time-frequency sampling2017

    • Author(s)
      Takahide Sakamoto, Guo-Wei Lu, Naokatsu Yamamto
    • Journal Title

      Journal of Lightwave Technology

      Volume: 35 Pages: 807-814

    • DOI

      10.1109/JLT.2016.2645224

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Flexible and scalable wavelength multicast of coherent optical OFDM with tolerance against pump phase-noise using reconfigurable coherent multi-carrier pumping2016

    • Author(s)
      Guo-Wei Lu, Tianwai Bo, Takahide Sakamoto, Naokatsu Yamamoto, and Calvin Chun-Kit Chan
    • Journal Title

      Optics Express

      Volume: 24 Pages: 22573-22580

    • DOI

      10.1364/OE.24.022573

    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] Ultrafast demultiplexing of optical time-division multiplexed signals by parallel opto-electronic time-frequency domain sampling2017

    • Author(s)
      Takahide Sakamoto; Guo-Wei Lu; Naokatsu Yamamoto
    • Organizer
      Optical Fiber Communication Conference (OFC)
    • Place of Presentation
      Los Angeles Convention Center, Los Angeles, USA
    • Year and Date
      2017-03-19 – 2017-03-23
    • Int'l Joint Research
  • [Presentation] All-optical signal upconversion using optically-injected DFB laser and embedded optoelectronic oscillator for Radio-over-fiber applications2017

    • Author(s)
      Ji Tao, Peng Wang, Long Huang, Yiyun Zhang, Dalei Chen, Peng Xiang, Jilin Zheng, Guo-Wei Lu, Xiangfei Chen, Tao Pu
    • Organizer
      Optical Fiber Communication Conference (OFC)
    • Place of Presentation
      Los Angeles Convention Center, Los Angeles, USA
    • Year and Date
      2017-03-19 – 2017-03-23
    • Int'l Joint Research
  • [Presentation] Full-Channel Parallel Measurement of 4x20-Gb/s All-Optical OFDM Signals by Using Loop-Assisted Coherent Matched Detector2016

    • Author(s)
      Takahide Sakamoto; Guo-Wei Lu; Naokatsu Yamamoto
    • Organizer
      Optical Fiber Communication Conference (OFC)
    • Place of Presentation
      CCD Congress Center, Dusseldorf, Germany
    • Year and Date
      2016-09-18 – 2016-09-22
    • Int'l Joint Research
  • [Presentation] Coherently-Pumped Wavelength Multicast of Multi-level Modulated Optical Signals with Tolerance against Phase Noise from Pumps2016

    • Author(s)
      Guo-Wei Lu
    • Organizer
      OptoElectronics Globe Conference (OGC)
    • Place of Presentation
      Convention & Exhibition Center, Shenzhen, China
    • Year and Date
      2016-09-05 – 2016-09-07
    • Int'l Joint Research / Invited
  • [Presentation] Differential coding in polarizations with half-symbol-period timing offset for coherent PM-QPSK to improve phase-noise tolerance2016

    • Author(s)
      Guo-Wei Lu, Takahide Sakamoto, Yukiyoshi Kamio
    • Organizer
      Optoelectronics and Communications Conference/International Conference on Photonics in Switching (OECC/PS)
    • Place of Presentation
      TOKI MESSE Niigata Convention Center, Niigata, Japan
    • Year and Date
      2016-07-03 – 2016-07-07
    • Int'l Joint Research
  • [Presentation] Investigation on Phase-Sensitive Fiber Nonlinearity Cancellation in Conjugated-Paired Radio-on-Fiber System2016

    • Author(s)
      Takahide Sakamoto, Guo-Wei LU, Tetsuya Kawanishi
    • Organizer
      Conference on Lasers and Electro-Optics (CLEO)
    • Place of Presentation
      San Jose Convention Center, San Jose, California, USA
    • Year and Date
      2016-05-14 – 2016-05-19
    • Int'l Joint Research
  • [Presentation] Experimental Investigation of Phase-Sensitive Amplification in Quantum-Dot Semiconductor Optical Amplifier2016

    • Author(s)
      Guo-Wei Lu, Tianwai Bo; Takahide Sakamoto; Kouich Akahane; Benjamin Puttnam; Calvin Chun-Kit Chan; Naokatsu Yamamoto
    • Organizer
      Conference on Lasers and Electro-Optics (CLEO)
    • Place of Presentation
      San Jose Convention Center, San Jose, California, USA
    • Year and Date
      2016-05-14 – 2016-05-19
    • Int'l Joint Research

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Published: 2018-01-16  

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