2024 Fiscal Year Research-status Report
Intelligently Scalable Multiple Light Sources for Parallel Coherent LiDAR
| Project/Area Number |
23K22760
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| Allocation Type | Multi-year Fund |
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| Research Institution | Kyushu University |
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Principal Investigator |
呂 国偉 九州大学, 先導物質化学研究所, 准教授 (30599709)
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| Co-Investigator(Kenkyū-buntansha) |
品田 聡 国立研究開発法人情報通信研究機構, ネットワーク研究所フォトニックICT研究センター, 研究マネージャー (00392720)
千葉 明人 群馬大学, 大学院理工学府, 准教授 (30435789)
坂本 高秀 東京都立大学, システムデザイン研究科, 准教授 (70392727)
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| Project Period (FY) |
2024-04-01 – 2026-03-31
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| Keywords | Four-wave Mixing / Coherent LiDAR / Optical Comb / Machine Learning |
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| Outline of Annual Research Achievements |
This year, we published six refereed journal papers and five refereed conference papers, focusing on chirp-based modulation techniques and integrated photonic devices.In the area of chirp-based modulation, we studied a multi-carrier chirp format with index modulation to enhance receiver sensitivity and increase achievable bit rates. This approach is particularly promising for integration with chirp-based sensing technologies such as FMCW ranging and aligns with our ongoing efforts to develop FMCW-based sensing systems. It also holds potential for the advancement of integrated sensing and communication systems. In parallel, we demonstrated photonic integrated devices capable of ultra-fast electro-optic modulation. Notably, one of our works was published in Communications Materials and was recognized as one of the top 25 most downloaded papers in 2024, underscoring the impact and significance of our research in this field.
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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 research is progressing smoothly as planned. We have investigated the application of chirp modulation in communication systems, and in parallel, demonstrated several photonic chips enabling ultra-fast electro-optic modulation, which are key components for both optical sensing and communication. These complementary efforts have ensured steady and effective advancement of the project.
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| Strategy for Future Research Activity |
In this fiscal year, we plan to focus on the demonstration of scalable optical comb generation for FMCW LiDAR. Depending on the progress, we will explore implementations based on either silicon nitride or AlGaAs-on-insulator platforms. Our goal is to realize a highly scalable and stable optical comb source suitable for integrated sensing applications.
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| Causes of Carryover |
Some components could not be delivered within FY2024 and are scheduled for delivery in FY2025. Therefore, a portion of the budget will be carried over to the next fiscal year to cover expenses such as the fiber array, photonic chip packaging, and related items.
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