| Project/Area Number |
26630161
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Electron device/Electronic equipment
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| Research Institution | Osaka University |
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Principal Investigator |
Igarashi Koji 大阪大学, 工学(系)研究科(研究院), 准教授 (80436534)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 超大容量伝送 / スペクトル整形 / 信号処理 / 波長多重 / 光ファイバ伝送 / パルス整形 / ディジタル信号処理 / コヒーレント光通信 |
|---|
| Outline of Final Research Achievements |
We numerically and experimentally evaluated performance of polybinary shaping for optical high-order quadrature amplitude modulated signals in the Super-Nyquist wavelength-division multiplexed (WDM) system, in which WDM spacing is smaller than the baudrate of the signal, resulting in the extremely high spectral efficiency. The polybinary shaping technique is effective for optimization between spectral efficiency and required signal-to-noise ratio corresponding to the target transmission lenght. In addition, we applied the Super-Nyquist WDM technique to space-division multiplexed fiber transmission. The trasnmission capacity over 2 Pbeit/s was achieved for the first time, and the record spectral efficiency of 456 bit/s/Hz was achieved.
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