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1 results

  • Temporal contrast enhancement by nonlinear elliptical polarization rotation in a multi-pass cell

  • Jiajun Song, Liya Shen, Jianyu Sun, Yujie Peng, Yuxin Leng
  • Journal:
    High Power Laser Science and Engineering / Volume 10 / 2022
    Published online by Cambridge University Press:
    01 September 2022, e28
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  • We demonstrate the simultaneous temporal contrast improvement and pulse compression of a Yb-doped femtosecond laser via nonlinear elliptical polarization rotation in a solid state multi-pass cell. The temporal contrast is improved to 109, while the pulse is shortened from 181 to 36 fs, corresponding to a compression factor of 5. The output beam features excellent beam quality with M 2 values of 1.18 × 1.16. The total efficiency of the contrast enhancement system exceeds 50%. This technique will have wide applications in high temporal contrast ultra-intense femtosecond lasers.