中国物理B ›› 2011, Vol. 20 ›› Issue (8): 84206-084206.doi: 10.1088/1674-1056/20/8/084206

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boldmath Broadband water window supercontinuum generation with a ω+3ω/2 multicycle two-colour pulse

杜洪川, 王小山, 胡碧涛   

  1. School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
  • 收稿日期:2010-12-13 修回日期:2011-04-11 出版日期:2011-08-15 发布日期:2011-08-15
  • 基金资助:
    Project supported by the Program for New Century Excellent Talents in University of China, the National Natural Science Foundation of China (Grant Nos. 10775062 and 10875054), and the Fundamental Research Funds for the Central Universities of China (Grant No. lzujbky-2010-k08).

Broadband water window supercontinuum generation with a ω+3ω/2 multicycle two-colour pulse

Du Hong-Chuan(杜洪川), Wang Xiao-Shan(王小山), and Hu Bi-Tao(胡碧涛)†   

  1. School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
  • Received:2010-12-13 Revised:2011-04-11 Online:2011-08-15 Published:2011-08-15
  • Supported by:
    Project supported by the Program for New Century Excellent Talents in University of China, the National Natural Science Foundation of China (Grant Nos. 10775062 and 10875054), and the Fundamental Research Funds for the Central Universities of China (Grant No. lzujbky-2010-k08).

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摘要： We propose a method to generate a high-efficiency broadband water window supercontinuum with a ω+3ω/2 multicycle two-colour pulse. Our results reveal that the 3ω/2 laser pulse can simultaneously modulate the acceleration step and the ionization step, which not only broadens the bandwidth but also enhances the yield of the generated supercontinuum. An ultra-broadband supercontinuum from 290 eV to 555 eV covering the whole water window is generated. Using this method, we expect that an isolated 62-as pulse with a minor pre-pulse can be directly obtained.

关键词: high-order harmonic, attosecond pulse, supercontinuum

Abstract: We propose a method to generate a high-efficiency broadband water window supercontinuum with a ω+3ω/2 multicycle two-colour pulse. Our results reveal that the 3ω/2 laser pulse can simultaneously modulate the acceleration step and the ionization step, which not only broadens the bandwidth but also enhances the yield of the generated supercontinuum. An ultra-broadband supercontinuum from 290 eV to 555 eV covering the whole water window is generated. Using this method, we expect that an isolated 62-as pulse with a minor pre-pulse can be directly obtained.

Key words: high-order harmonic, attosecond pulse, supercontinuum

中图分类号:  (Frequency conversion; harmonic generation, including higher-order harmonic generation)

  • 42.65.Ky
32.80.Rm (Multiphoton ionization and excitation to highly excited states) 42.65.Re (Ultrafast processes; optical pulse generation and pulse compression)