High Power Laser Science and Engineering, Volume. 6, Issue 2, 02000e15(2018)

LD-pumped gas-cooled multislab Nd:glass laser amplification to joule level

Wenfa Huang1,2、*, Jiangfeng Wang1,2, Xinghua Lu1,2, Tingrui Huang1,2, Jiangtao Guo1,2, Wei Fan1,2, and Xuechun Li1,2
Author Affiliations
  • 1Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 2National Laboratory on High Power Laser and Physics, Shanghai 201800, China
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    Figures & Tables(12)
    Layout of the LD-pumped gas-cooled multislab Nd:glass amplifier. LD1–LD2: laser diode arrays; L1–L6: lenses; MON: monitor; 10X: expander; SA: serrated aperture; PBS: polarization beam splitter; FR: Faraday rotator; M1–M4: 1053-nm HR mirrors; DM5–DM6: dichroic mirrors.
    Schematic overview of the amplifier head.
    Sketch overview of the fringe mirror.
    Pump light distribution: (a) experimental result; (b) theoretical prediction.
    Pump profiles at different positions.
    Gain distribution over the cross section of the four slabs.
    Single-pass, thermally induced transmitted wavefront distortion through the amplifier: (a) theoretical prediction; (b) experimental result.
    2D-Legendre polynomial analysis of the measured single-pass transmission wavefronts.
    Wavefront aberration profile with the defocus term removed.
    Predicted and measured output energy of the amplifier as a function of the number of passes at different repetition rates for a pump pulse energy of 7.3 J. The inset shows the near-field profile of the output for a repetition rate of 0.2 Hz at a 0.5 J operation.
    Output energy stability at 0.2 Hz.
    • Table 1. Optical and thermal properties of Nd:glass slabs (NAP2).

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      Table 1. Optical and thermal properties of Nd:glass slabs (NAP2).

      PerformanceValue
      Refractive index 1.542
      Fluorescence lifetime 360
      Temp. coeff. refractive index () ()8.7
      Thermal expansion coeff. () ()82
      Thermal conductivity () 0.83
      Density ()2.76
      Elastic modulus ()58
      Poisson’s ratio0.232
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    Wenfa Huang, Jiangfeng Wang, Xinghua Lu, Tingrui Huang, Jiangtao Guo, Wei Fan, Xuechun Li. LD-pumped gas-cooled multislab Nd:glass laser amplification to joule level[J]. High Power Laser Science and Engineering, 2018, 6(2): 02000e15

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    Paper Information

    Received: Sep. 7, 2017

    Accepted: Nov. 4, 2017

    Published Online: Jul. 4, 2018

    The Author Email: Wenfa Huang (huangwf@siom.ac.cn)

    DOI:10.1017/hpl.2018.7

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