| Project/Area Number |
26630168
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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 |
Communication/Network engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
KASAI KEISUKE 東北大学, 電気通信研究所, 助教 (80534495)
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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: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | 信号処理 / 光PLL / 音響光学変調器 / コヒーレント光通信 |
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| Outline of Final Research Achievements |
With the aim of applying to ultra-multilevel coherent optical communication, I have developed a wideband, narrow linewidth optical voltage controller (OVCO) by using an acousto-optic modulator (AOM) and a narrow linewidth laser. By employing a InP-based AOM, I have realized a wideband OVCO with a 0.1 dB-frequency response bandwidth of ±2.5 MHz. With an optical phase-locked loop (PLL) circuit consisting of the present OVCO and a 1.5 um narrow linewidth fiber laser, which enables us to realize carrier phase synchronization between the transmitted data and the LO signal, I have successfully transmitted a 120 Gbit/s 64 QAM data over 150 km. This is the first time coherent transmission with an AOM-based OVCO-PLL system.
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