• High Power Laser Science and Engineering
  • Vol. 12, Issue 4, 04000e49 (2024)
Shuren Pan1,2, Fenxiang Wu1, Yang Zhao1, Jiabing Hu1..., Zongxin Zhang1, Yi Xu1,4,*, Yuxin Leng1,4,*, Ruxin Li1 and Efim Khazanov3,4|Show fewer author(s)
Author Affiliations
  • 1State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences, Shanghai, China
  • 2Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
  • 3Gaponov-Grekhov Institute of Applied Physics (IAP) of Russian Academy of Sciences, Moscow, Russia
  • 4China–Russian Belt and Road Joint Laboratory on Laser Science, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China
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    DOI: 10.1017/hpl.2024.31 Cite this Article Set citation alerts
    Shuren Pan, Fenxiang Wu, Yang Zhao, Jiabing Hu, Zongxin Zhang, Yi Xu, Yuxin Leng, Ruxin Li, Efim Khazanov, "A novel small-scale self-focusing suppression method for post-compression in high peak power lasers," High Power Laser Sci. Eng. 12, 04000e49 (2024) Copy Citation Text show less

    Abstract

    A novel method, combining an asymmetric four-grating compressor (AFGC) with pulse post-compression, is numerically demonstrated to improve the spatial uniformity of laser beams and hence to suppress small-scale self-focusing (SSSF) during the beam propagation in nonlinear materials of high peak power lasers. The spatial uniformity of laser beams is an important factor in performing post-compression, due to the spatial intensity modulation, or hot spots will be aggravated during the nonlinear propagation and then seriously damage the subsequent optical components. Three-dimensional numerical simulations of post-compression are implemented based on a femtosecond laser with a standard compressor and an AFGC, respectively. The simulated results indicate that post-compression with the AFGC can efficiently suppress the SSSF and also shorten the laser pulses from 30 fs to sub-10 fs. This work can provide a promising route to overcome the challenge of SSSF and will be meaningful to promote the practical application of the post-compression technique in high peak power lasers.
    Az=i2k02A+ik0n2n0|A|2Aiβ222At2k0n2n0ω0(A|A|2)t. ((1))

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    θmax=2n2In0;Kmax=K0θmax=2πn0λ02n2In0. ((2))

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    d0=(tanβ(ωs)tanβ(ωl))×cosα×(L2L1). ((3))

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    PTAout=exp((L2L1l)2)(PTAinPTAideal)+PTAideal, ((4))

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    l=ω0τFWHMln2kmaxcos3β(ω0)(sinα+|sinβ(ω0)|)cosα. ((5))

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    Shuren Pan, Fenxiang Wu, Yang Zhao, Jiabing Hu, Zongxin Zhang, Yi Xu, Yuxin Leng, Ruxin Li, Efim Khazanov, "A novel small-scale self-focusing suppression method for post-compression in high peak power lasers," High Power Laser Sci. Eng. 12, 04000e49 (2024)
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