2019 Fiscal Year Research-status Report
Optical Subcarrier Processing for Nyquist SCM Signals using Four-Wave Mixing with Coherent Pumps
| Project/Area Number |
18K04152
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| Research Institution | Tokai University |
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Principal Investigator |
呂 国偉 東海大学, 創造科学技術研究機構, 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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| Keywords | Four-wave Mixing / Subcarrier Multiplexing / Signal Processing / Single-Side Band |
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| Outline of Annual Research Achievements |
In the second year of this project, we have successfully validated our proposed sub-carrier processing scheme by experimentally synthesizing a Nyquist single-side band (SSB) signal with high-order modulation format through optical nonlinearity-based subcarrier processing techniques, i.e. coherently-pumped four-wave mixing. In the experimental validation, two independent binary-modulated subcarriers in the input dual-SSB signal are coherently merged, finally generating a new SSB Nyquist signal with quadrature phase-shift keying (QPSK). All of the information carried in the input two subcarriers have been well conserved and merged, eventually forming a new 2-dimension modulation format (QPSK) in a complex plane. Meanwhile, the multicast of the SSB carriers is achieved.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
The project is progressing well. The validation of our proposed subcarrier processing scheme has been successfully performed by experimental demonstration. A 12.5 Gbps SSB Nyquist 16QAM was experimentally synthesized from a 2×6.25 Gbps twin-SSB Nyquist QPSK with an error-free operation.
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| Strategy for Future Research Activity |
In the next year, we are going to explore the possibility to further extend our proposed scheme to other applications, such as distance measurement or ranging.
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| Causes of Carryover |
Due to the COVID-19 pandemic, the scheduled conference trip in US has to be cancelled.
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