Acta Optica Sinica, Volume. 44, Issue 20, 2014006(2024)

Optical Scheme Simulation of Table-Top 20 TW Laser Based on Yb∶YGG

Jinsheng Liu, Xianghe Guan*, Lailin Ji, Tao Wang, Fawang Zhang, Jia Liu, Zhan Sui, Yong Cui, Xiaohui Zhao, and Yanqi Gao
Author Affiliations
  • Shanghai Institute of Laser and Plasma, China Academy of Engineering Physics, Shanghai 201800, China
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    Figures & Tables(9)
    Optical schematic of table-top laser amplification system with high repetition frequency, high-energy, and sub-picosecond
    Capability of laser gain medium for energy storage and generation of high peak power, and yellow dotted line shows the theoretical limit
    Gain (G) of Yb∶YGG crystal at different thicknesses (d) and doping concentrations (D). (a) Variation of G with D at different d in gain medium; (b) optimal D of gain medium at different d;(c) G of medium at different d and corresponding Dd value; (d) G of medium and optimal D at different wavelengths (λ)
    Simulation results for broadband CPA system based on Yb∶YGG. (a) Time domain waveform of chirped pulses; (b) spectral bandwidth (Δ); (c) FTL pulse width; (d) evolution of output energy and B integral in the eight-pass CPA stages
    Schematic of vacuum compressor based on four gratings
    • Table 1. Parameter comparison of typical gain medium in high-energy laser systems

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      Table 1. Parameter comparison of typical gain medium in high-energy laser systems

      Gain mediumSaturation fluence /(J·cm-2Radiative lifetime /msThermal conductivity /(W·m·K-1

      Absorption

      cross-section /(10-20 cm2

      Absorption bandwidth /nmEmission cross-section /(10-20 cm2Emission bandwidth /nm
      Yb∶YAG9.50.956.700.76@940 nm182.03@1030 nm9
      Yb∶LuGG158.91.044.940.84@924 nm212.18@1023 nm16
      Yb∶YGG16-188.51.783.470.90@940 nm262.26@1030 nm22
      Yb∶CNGG19-208.10.794.701.60@934 nm432.50@1028 nm21
      Yb∶LuAG217.41.327.500.72@940 nm222.59@1030 nm10
    • Table 2. Effect of input pulse energy on CPA system

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      Table 2. Effect of input pulse energy on CPA system

      Input energy /μJInput pulse duration /nsInput bandwidth /nmOutput energy /JOutput bandwidth /nm

      FTL pulse

      duration /ps

      B integralOutput center wavelength /nm
      102916.831.57390.990.55471030.090
      202921.571.65880.940.81001030.129
      302923.451.73050.900.96281030.147
      402924.231.79590.871.06631030.163
      502924.491.85700.841.14161030.174
    • Table 3. Effect of input pulse bandwidth on CPA system

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      Table 3. Effect of input pulse bandwidth on CPA system

      Input energy /μJInput pulse duration /nsInput bandwidth /nmOutput energy /JOutput bandwidth /nm

      FTL pulse

      duration /ps

      B integralOutput center wavelength /nm
      302325.661.65090.950.64301030.303
      302525.071.86170.840.75961030.207
      302724.291.79270.870.87011030.170
      302923.451.73050.901.06631030.163
      3021122.631.69480.921.04251030.135
    • Table 4. Effect of input pulse duration on CPA system

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      Table 4. Effect of input pulse duration on CPA system

      Input energy /μJInput pulse duration /nsInput bandwidth /nmOutput energy /JOutput bandwidth /nm

      FTL pulse

      duration /ps

      B integralOutput center wavelength /nm
      302525.071.86170.840.75961030.207
      303525.051.85910.840.50621030.206
      304525.051.85850.840.37961030.206
      305525.051.85800.840.30371030.204
      306525.051.85790.840.25311030.208
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    Jinsheng Liu, Xianghe Guan, Lailin Ji, Tao Wang, Fawang Zhang, Jia Liu, Zhan Sui, Yong Cui, Xiaohui Zhao, Yanqi Gao. Optical Scheme Simulation of Table-Top 20 TW Laser Based on Yb∶YGG[J]. Acta Optica Sinica, 2024, 44(20): 2014006

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    Paper Information

    Category: Lasers and Laser Optics

    Received: Apr. 18, 2024

    Accepted: May. 20, 2024

    Published Online: Oct. 12, 2024

    The Author Email: Guan Xianghe (guanxianghe@163.com)

    DOI:10.3788/AOS240868

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