| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
In this research, we proposed a novel method of cascading optical phase modulators for a high bit resolution and demonstrated extremely high-order phase modulation for physical layer encryption of high-speed fiber-optic communications. Proof-of-concept experiments of the proposed method were achieved. The method was successfully applied to physical layer encryption of optical signals at 10 Gbit/s or higher. Furthermore, optical devices that integrate multiple phase modulators were studied. We showed that the physical layer encryption with the proposed method simultaneously realized high security and adequate signal quality. Physical-layer encrypted high-speed optical signal transmission over a long-haul fiber was experimentally demonstrated.
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