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1 results

  • Eight-pass neodymium-doped yttrium aluminum garnet laser amplifier at the 5 J level

  • Xinxing Lei, Zhou Dai, Xiaokai Huang, Yumei Zhang, Suyang Wang, Yuhang Li, Qiang Liu, Xing Fu
  • Journal:
    High Power Laser Science and Engineering / Volume 13 / 2025
    Published online by Cambridge University Press:
    07 April 2025, e44
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  • This paper presents an innovative eight-pass laser amplifier design that effectively utilizes polarization and angular multiplexing, enjoying high gain, high extraction efficiency and compact layout. To optimize the design parameters, a general spatiotemporal model for a multi-pass amplifier is established that accounts for beam passages in different angles, and the predicted output energy and gain distribution agree well with the experimental results. The multi-pass amplifier scales the seed energy of 120 mJ to 5 J at 10 Hz and 3 J at 50 Hz, with the beam quality within three times the diffraction limit.