Investigations of spectrally tunable, nanosecond laser pulse compression characteristics by SBS technique
| Project/Area Number |
21K04934
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 30020:Optical engineering and photon science-related
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| Research Institution | Institute for Laser Technology |
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Principal Investigator |
コスロービアン ハイク 公益財団法人レーザー技術総合研究所, レーザープロセス研究チーム, 副主任研究員 (70291036)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2023: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | SBS / pulse compression / tunable laser pulse / ns pulse compression / compact SBS cell / SBS; / ns pulse compression; / compact SBS cell; / 誘導ブリルアン散乱 / パルス圧縮 |
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| Outline of Research at the Start |
In this research, wavelength (color) tunable, several nanoseconds (1 ns = 0.000000001 seconds) duration optical pulse compression characteristics based on the stimulated Brillouin scattering (SBS) non-linear phenomenon will be elucidated. For this purpose, a color-tunable Ti:Sapphire pulse-laser will be used and a variable-length, compact SBS amplifier cell will be designed and built. Spectral characteristics of the pulse compression in different media will be elucidated.
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| Outline of Annual Research Achievements |
A compact ns pulse compressor system based on stimulated Brillouin scattering (SBS) has been designed and built.
Pulse compression experiments of 18-30ns duration, 5-13mJ energy Ti:Sapphire laser pulses in 720-850nm region were performed using FC72 and FC40 SBS liquids.
Compared with the case of no intracavity etalon, the compressed pulse width decreased from 11.2ns to 7.0ns, and the efficiency improved from 42% to 55%. The short coherence length of the pump pulse (13.5 cm, bandwidth 2.23 GHz) has been identified as the main reason for low energy conversion efficiency.
To increase the efficiency, narrowband pulses (longer coherence length) must be used.
We have also built an SHG unit and investigated the SHG conversion efficiency and stability of the compressed pulses in a broader spectral region.
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Report
(3 results)
Research Products
(9 results)
