引用本文格式: 刘航,杨大佐,冯立强. 不同啁啾调制对光谱连续区的影响 [J]. 四川大学学报: 自然科学版, 2020, 57: .
 
不同啁啾调制对光谱连续区的影响
Effects of different chirps on spectral continuum
摘要点击 148  全文点击 17  投稿时间:2019-08-09  修订日期:2019-09-17
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DOI编号   
中文关键词   高次谐波  啁啾激光场  光谱连续区  阿秒脉冲
英文关键词   High-order harmonic generation  Chirped pulse  Spectral continuum  Attosecond pulse
基金项目   国家自然科学基金,省自然科学基金
作者单位E-mail
刘航 辽宁工业大学化学与环境工程学院 liuhang20@126.com 
杨大佐 大连海洋大学水产与生命学院  
冯立强 辽宁工业大学理学院 lqfeng1101@126.com 
Author NameAffiliationE-mail
LIU Hang School of Chemical and Environmental Engineering, Liaoning University of Technology liuhang20@126.com 
YANG Da-Zuo College of Fisheries and Life Science, Dalian Ocean University  
FENG Li-Qiang College of Science, Liaoning University of Technology lqfeng1101@126.com 
中文摘要
    利用啁啾场调控激光波形,理论研究了不同啁啾场对高次谐波光谱的影响. 结果表明:当采用对称中间啁啾调控时,谐波截止能量的延伸及光谱连续区来自于激光中间区域. 当采用不对称负向啁啾调控时,谐波截止能量的延伸及光谱连续区来自于激光下降区域. 虽然,谐波截止能量在不同啁啾调控下都可以得到延伸,但是,不对称负向啁啾场下光谱连续区的强度要比对称中间啁啾场下光谱连续区强度高2个数量级. 最后,通过叠加光谱连续区上的谐波可以获得2个脉宽在38 as的单个阿秒脉冲. 并且,负向啁啾场下获得脉冲强度要比对称中间啁啾场下获得脉冲强度高2个数量级.
英文摘要
    The effects of high-order harmonic generation on different chirps have been investigated using the laser waveform control modulated by chirped pulse. The results show that when using the symmetric-mid-chirped pulse, the extension of harmonic cutoff and spectral continuum come from the middle part of the laser field. However, when using the asymmetric-down-chirped pulse, the extension of harmonic cutoff and spectral continuum stem from the falling part of the laser field. Although the harmonic cutoffs from different chirped pulses can be extended, the intensity of spectral continuum from asymmetric-down-chirped pulse is two orders of magnitude higher than that from the symmetric-mid-chirped pulse. With the superposition of harmonics on the spectral continuum, two single attosecond pulses with a pulse width of 38 as can be obtained. Moreover, the intensity of attosecond pulse obtained from the asymmetric-down-chirped pulse is two orders of magnitude higher than that from the symmetric-mid-chirped pulse.

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