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1 results

  • A Yb:KGW dual-crystal regenerative amplifier

  • Part of
  • Huijun He, Jun Yu, Wentao Zhu, Xiaoyang Guo, Cangtao Zhou, Shuangchen Ruan
  • Journal:
    High Power Laser Science and Engineering / Volume 8 / 2020
    Published online by Cambridge University Press:
    26 October 2020, e35
    • Article
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  • This study develops a Yb:KGW dual-crystal based regenerative amplifier. The thermal lensing and gain-narrowing effects are compensated by the dual-crystal configuration. Sub-nanojoule pulses are amplified to 1.5 mJ with 9 nm spectral bandwidth and 1 kHz repetition rate using chirped pulse amplification technology. Consequently, 1.2 mJ pulses with a pulse duration of 227 fs are obtained after compression. Thanks to the cavity design, the output laser was a near diffraction limited beam with M2 around 1.1. The amplifier has the potential to boost energy above 2 mJ after compression and act as a front end for a future kilohertz terawatt-class diode-pumped Yb:KGW laser system.