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High Power Laser Science and Engineering, Volume. 8, Issue 2, 02000e20(2020)

Pushing the boundaries of diode-pumped solid-state lasers for high-energy applications

Saumyabrata Banerjee1、*, Paul Mason1, Jonathan Phillips1, Jodie Smith1, Thomas Butcher1, Jacob Spear1, Mariastefania De Vido1, Gary Quinn2, Danielle Clarke1, Klaus Ertel1, Cristina Hernandez-Gomez1, Chris Edwards1, and John Collier1
Author Affiliations
  • 1Central Laser Facility, STFC Rutherford Appleton Laboratory, DidcotOX11 0QX, UK
  • 2Heriot-Watt University, School of Engineering and Physical Sciences, EH14 4AS, UK
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    3D model of D100X laser showing FE front end; BT beam transport; PA room-temperature pre-amplifier (1 Yb:CaF2 regenerative, 2 Yb:YAG multi-pass); MA main cryogenic amplifier (1 stage 1, 2 stage 2); CGC cryogenic gas coolers; D 940 nm diode pumps (1 & 2 for MA-1, 3 & 4 for MA-2). The inset shows the far-field image recorded at 105 J, 10 Hz operation.

    Fig. 1. 3D model of D100X laser showing FE  front end; BT  beam transport; PA  room-temperature pre-amplifier (1  Yb:CaF2 regenerative, 2  Yb:YAG multi-pass); MA  main cryogenic amplifier (1  stage 1, 2  stage 2); CGC  cryogenic gas coolers; D  940 nm diode pumps (1 & 2 for MA-1, 3 & 4 for MA-2). The inset shows the far-field image recorded at 105 J, 10 Hz operation.

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    (a) Example of automatic pulse shaping capability of the D100X laser for achieving a flat-top temporal profile at75 J, 10 Hz operation;(b) long-term stability over 6 h at 10 Hz.

    Fig. 2. (a) Example of automatic pulse shaping capability of the D100X laser for achieving a flat-top temporal profile at75 J, 10 Hz operation;(b) long-term stability over 6 h at 10 Hz.

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    (a) Output energetics, experimentally measured (circle) and numerically calculated (dotted lines); (b) long-term operation at 150 J, 1 Hz, and the inset shows the near-field profile at 150 J, 1 Hz operation; (c) temporal profile of the front end (FE), main-amplifier 1 (MA1) and main-amplifier 2 (MA2) during 150 J, 1 Hz operation.

    Fig. 3. (a) Output energetics, experimentally measured (circle) and numerically calculated (dotted lines); (b) long-term operation at 150 J, 1 Hz, and the inset shows the near-field profile at 150 J, 1 Hz operation; (c) temporal profile of the front end (FE), main-amplifier 1 (MA1) and main-amplifier 2 (MA2) during 150 J, 1 Hz operation.

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    • Table 1. D100X laser system performance at different temperatures, seed and pump inputs.

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      Table 1. D100X laser system performance at different temperatures, seed and pump inputs.

      Temp. (K)Seed (J)Pump (J)Energy output (J)Efficiency (%)
      140 5.6 390 103.4 26.5
      135 5.6 390 109.7 28.1
      130 5.6 390 112.8 28.9
      1255.6 390 116.0 29.7
      1256.9 390 120.7 30.9
      1258.2 390 124.8 32.0
      130 9.1600 150.9 25.1
      125 9.1600 152.4 25.4
      125 10.2600 153.7 25.6
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    Saumyabrata Banerjee, Paul Mason, Jonathan Phillips, Jodie Smith, Thomas Butcher, Jacob Spear, Mariastefania De Vido, Gary Quinn, Danielle Clarke, Klaus Ertel, Cristina Hernandez-Gomez, Chris Edwards, John Collier. Pushing the boundaries of diode-pumped solid-state lasers for high-energy applications[J]. High Power Laser Science and Engineering, 2020, 8(2): 02000e20

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    Paper Information

    Category: Letters

    Received: Feb. 12, 2020

    Accepted: Apr. 2, 2020

    Published Online: May. 21, 2020

    The Author Email: Saumyabrata Banerjee (saumyabrata.banerjee@stfc.ac.uk)

    DOI:10.1017/hpl.2020.20

    Topics

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