Research of high speed and high precision LiDAR with real time air refractive index self correction
Project/Area Number |
22KJ1365
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Project/Area Number (Other) |
22J12145 (2022)
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Research Category |
Grant-in-Aid for JSPS Fellows
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Allocation Type | Multi-year Fund (2023) Single-year Grants (2022) |
Section | 国内 |
Review Section |
Basic Section 30020:Optical engineering and photon science-related
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Research Institution | The University of Electro-Communications |
Principal Investigator |
LI RUNMIN 電気通信大学, 情報理工学研究科, 特別研究員(DC2)
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Project Period (FY) |
2023-03-08 – 2024-03-31
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Project Status |
Granted (Fiscal Year 2023)
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Budget Amount *help |
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 2023: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2022: ¥900,000 (Direct Cost: ¥900,000)
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Keywords | EO comb / coherent synthesis / low noise / broadband |
Outline of Research at the Start |
A fast and precise LIDAR system with real-time air refractive index self-correction is demonstrated. This LIDAR system is based on a novel coherently synthesized dual-color EO comb. This LIDAR system is able to achieve sub-micrometer precision with > 100 kHz update rate. The proposed LIDAR system is capable to realize dead-zone free measurement at a distance >2 m up to very long distance owing to the high and tunable repetition rate of EO comb. Real time air refractive index self-correction method is applied to the LIDAR system.
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Outline of Annual Research Achievements |
A coherently synthesized two-color EO comb is constructed within this year. Two CW lasers with distinct center wavelengths are modulated by EO modulators, resulting in two EO combs. The coherent synthesis between the two EO combs leads to the generation of coherently synthesized two-color EO comb. This coherently synthesized two-color EO comb shows the advantageous of broadband spectrum and low phase noise.
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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 goes smoothly in the past year. The research result, which is the demonstration of coherently synthesized two-color EO comb, is the important basic of the following research. In the next year, a LIDAR system will construct based on the coherently synthesized two-color EO comb. This LIDAR system will show the advantageous of high update rate and high precision.
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Strategy for Future Research Activity |
A LIDAR system with high update rate and high precision will be constructed in this year. The coherently synthesized two-color EO comb is utilized as the optical source of the LIDAR system. The performance of the LIDAR system will be systematically studied, including the long-term and short-term stability, the linearity and measurement errors. Some technologies and improvements will be implemented to improve the system performance. The non-ambiguity range of the system will be extended by combining several measurement methods. Finally, absolute distance measurement with nanometer precision in extended non-ambiguity range will be realized in this system.
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Report
(1 results)
Research Products
(8 results)