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Chinese Journal of Lasers, Volume. 46, Issue 9, 901005(2019)

Pulse-Duration-Dependent Clamping Intensity in Femtosecond Laser Filament

Zhang Xuan1,2, Wang Tiejun1,2、*, Guo Hao1,2, Sun Haiyi1, and Li Ruxin1,2
Author Affiliations
  • 1State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences, Shanghai 201800, China
  • 2Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences,Beijing 100049, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (6)
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    References (44)
    Cited By (3)
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    Figures & Tables(6)
    Diagram of experimental optical path. Illustration is typical pre-ablation pinhole

    Fig. 1. Diagram of experimental optical path. Illustration is typical pre-ablation pinhole

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    Relationship between ablated pinhole diameter and number of incident laser shots

    Fig. 2. Relationship between ablated pinhole diameter and number of incident laser shots

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    Measured laser fluence as a function of input laser energy at pulse duration of 30 fs (without chirp)

    Fig. 3. Measured laser fluence as a function of input laser energy at pulse duration of 30 fs (without chirp)

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    Measured clamping intensity versus pulse duration at filaments

    Fig. 4. Measured clamping intensity versus pulse duration at filaments

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    Variation in filament intensity (E2) with initial chirp number (i.e. pulse duration) of incident laser

    Fig. 5. Variation in filament intensity (E2) with initial chirp number (i.e. pulse duration) of incident laser

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    • Table 1. Parameters insimulation calculations

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      Table 1. Parameters insimulation calculations

      ParameterValue
      Wavelength λ0 /(10-9 m)800
      Group velocity dispersion k(2) /(10-29 s2·m-1)2[40]
      Nonlinear index n2 /(10-19 cm2·W-1)3.2[40]
      Focal length of the lens F /m0.3
      Cross section for inverse bremsstrahlungσ /(10-24 m2)5[41]
      Ionization energy Eg /eV14.9
      Multiphoton ionization rate β(K) /(10-126 cm17·W-9)1.27
      Multiphoton ionization order K10
      Recombination rate α/(10-13 m3·s-1)5[41]
      Speed of light c /(108 m·s-1)3
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    Zhang Xuan, Wang Tiejun, Guo Hao, Sun Haiyi, Li Ruxin. Pulse-Duration-Dependent Clamping Intensity in Femtosecond Laser Filament[J]. Chinese Journal of Lasers, 2019, 46(9): 901005

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    Paper Information

    Category: laser devices and laser physics

    Received: Mar. 22, 2019

    Accepted: --

    Published Online: Sep. 10, 2019

    The Author Email: Tiejun Wang (tiejunwang@siom.ac.cn)

    DOI:10.3788/CJL201946.0901005

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology