| 超短脉冲高次谐波谱的连续性 |
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| 引用本文： | 陈基根,陈燕琴,黄文龙,杨玉军. 超短脉冲高次谐波谱的连续性[J]. 吉林大学学报(理学版), 2008, 46(5): 959-962 |
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| 作者姓名： | 陈基根 陈燕琴 黄文龙 杨玉军 |
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| 作者单位： | 1. 台州学院 物理系, 浙江 椒江 318000; 2. 吉林大学 物理学院, 长春 130012; 3. 吉林大学 原子与分子物理研究所, 长春 130012 |
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| 摘 要： | 研究超短脉冲（3个光学周期）高次谐波发射功率谱的性状及其成因. 结果表明, 短脉冲谐波谱与长脉冲（10个光学周期）相比, 其平台区末端的谐波谱变得伪连续. 这是由于3个原因导致该现象: (1) 在短脉冲情形下, 谐波的生成仅经历1~2次辐射, 在长脉冲情形下, 谐波的生成经历多次辐射的累加; (2) 对于相同的谐波级次, 短脉冲比长脉冲的谐波线宽宽; (3) 短脉冲比长脉冲的激光频谱宽.
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| 关 键 词： | 高次谐波 小波变换 短脉冲激光 |
| 收稿时间： | 2007-09-15 |
Continuum Analysis of High-order Harmonic Generation Spectrum by an Ultra-short Laser Pulse |
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| CHEN Ji-gen,CHEN Yan-qin,HUANG Wen-long,YANG Yu-jun. Continuum Analysis of High-order Harmonic Generation Spectrum by an Ultra-short Laser Pulse[J]. Journal of Jilin University: Sci Ed, 2008, 46(5): 959-962 |
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| Authors: | CHEN Ji-gen CHEN Yan-qin HUANG Wen-long YANG Yu-jun |
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| Affiliation: | 1. Department of Physics, Taizhou University, Jiaojiang 318000, Zhejiang Province, China; 2. College of Physics, Jilin University, Changchun 130012, China; 3. Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China |
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| Abstract: | We investigated the high-order harmonic generation(HHG) power spectrum by means of an ultra-short laser pulse.Our numerical results show that the harmonics at the end of the plateau of HHG spectrum become successive compared with that of HHG spectrum by a long laser pulse.Three primary reasons cause this character: firstly,in the former,one or two irradiations contribute to the harmonic generation,while in the latter,the multi-cycle accumulation of the harmonic generation causes separate sharp peaks;secondl... |
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| Keywords: | high-order harmonic generation wavelet transform ultra-short laser pulse |
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