| Project/Area Number |
18K04152
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 21020:Communication and network engineering-related
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| Research Institution | The University of Aizu (2020-2021)
Tokai University (2018-2019) |
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Principal Investigator |
Lu Guo-Wei 会津大学, コンピュータ理工学部, 上級准教授 (30599709)
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| Co-Investigator(Kenkyū-buntansha) |
千葉 明人 群馬大学, 大学院理工学府, 助教 (30435789)
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)
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| Project Period (FY) |
2018-04-01 – 2022-03-31
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| Project Status |
Completed (Fiscal Year 2021)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | optical communications / four-wave mixing / nonlinear optics / Four-wave Mixing / Subcarrier Multiplexing / Single-side band signal / Signal Processing / Single-Side Band / Four-wave mixing / Subcarrier multiplexing / Signal processing / Optical Processing / Four-Wave Mixing / Nyquist |
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| Outline of Final Research Achievements |
The main research output of this project could be summarized below. (a) subcarrier multicast and data aggregation with coherent detections; (b) synthesis of high-order quadrature-amplitude modulation (QAM) subcarrier from input low-order QAM twin-SSBs by coherent superposition with direct detection. In addition, a specific algorithm named hierarchical blind phase search was proposed and developed to cope with the imperfect phase rotation in the coherent superposition process. In both cases, error-free operations and clear constellations were experimentally demonstrated for the synthesized high-order subcarrier with either coherent or direct detection, verifying the proposed scheme.
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| Academic Significance and Societal Importance of the Research Achievements |
The proposed processing schemes would be helpful for effectively managing the subcarrier granularity in subcarrier multiplexing systems, offering a flexible and efficient spectrum management, enabling the adaptive cross-connection in in-band level, and eventually realizing agile optical networks.
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