2021 Fiscal Year Final Research Report
Development of high-power ultrashort pulsed laser with gain narrowing suppression by spatial wavelength distribution
| Project/Area Number |
20K15192
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 30020:Optical engineering and photon science-related
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| Research Institution | Nagoya University (2021)
Osaka University (2020) |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2022-03-31
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| Keywords | レーザー / フェムト秒レーザー / 薄ディスクレーザー / 高出力レーザー / 半導体直接励起固体レーザー |
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| Outline of Final Research Achievements |
This study proposes a novel method to suppress gain narrowing and enable an industrially useful high-power ultrashort pulse laser source. The design had to be changed according to the results of numerical analysis, and actual amplification of ultrashort laser pulses could not be achieved during the research period. However, we achieved the highest output power (138 W) for a laser using Yb:KREW crystals in CW oscillation and developed a disk module that is capable of withstanding high pumping intensities of 7 kW/cm2. The disk module is expected to be of great value in the development of high-power ultrashort laser oscillators and amplifiers. We will use the obtained disk module for the amplification of ultrashort pulsed lasers, which is the original purpose of the project, as well as for proof of concept.
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| Free Research Field |
レーザー工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究で得られた高出力動作が可能なYb:KLuW薄ディスクレーザーモジュールを用いれば，これまで得られていなかったような広帯域な超短パルスレーザーの発振，増幅が高い出力レベルで達成できる．これらのレーザーは特殊な機械加工など産業用途において有用であるうえ，高いエネルギーを生かして高次高調波発生や非線形分光などの分野においても応用の幅を広げることができる．
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