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1.2 kW all-fiber narrow-linewidth picosecond MOPA system

High power laser science and engineering, 2023-01, Vol.11, Article e22 [Peer Reviewed Journal]

The Author(s), 2023. Published by Cambridge University Press in association with Chinese Laser Press ;The Author(s), 2023. Published by Cambridge University Press in association with Chinese Laser Press. This work is licensed under the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0 (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;ISSN: 2095-4719 ;EISSN: 2052-3289 ;DOI: 10.1017/hpl.2023.26

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  • Title:
    1.2 kW all-fiber narrow-linewidth picosecond MOPA system
  • Author: Zuo, Jiexi ; Yu, Haijuan ; Zou, Shuzhen ; Dong, Zhiyong ; He, Chaojian ; Xu, Shuang ; Ning, Chaoyu ; Chen, Xuechun ; Li, Xinyao ; Lin, Xuechun
  • Subjects: Amplifiers ; Bandwidths ; Beams (radiation) ; Energy ; fiber laser ; Lasers ; Master oscillator/power amplifier ; nonlinear optics ; picosecond pulse ; Repetition ; Spectrum allocation ; Spectrum analysis ; transverse mode instability
  • Is Part Of: High power laser science and engineering, 2023-01, Vol.11, Article e22
  • Description: Achieving an all-fiber ultra-fast system with above kW average power and mJ pulse energy is extremely challenging. This paper demonstrated a picosecond monolithic master oscillator power amplifier system at a 25 MHz repetition frequency with an average power of approximately 1.2 kW, a pulse energy of approximately 48 μJ and a peak power of approximately 0.45 MW. The nonlinear effects were suppressed by adopting a dispersion stretched seed pulse (with a narrow linewidth of 0.052 nm) and a multi-mode master amplifier with an extra-large mode area; then an ultimate narrow bandwidth of 1.32 nm and a moderately broadened pulse of approximately 107 ps were achieved. Meanwhile, the great spatio-temporal stability was verified experimentally, and no sign of transverse mode instability appeared even at the maximum output power. The system has shown great power and energy capability with a sacrificed beam propagation product of 5.28 mm $\cdot$ mrad. In addition, further scaling of the peak power and pulse energy can be achieved by employing a lower repetition and a conventional compressor.
  • Publisher: Cambridge, UK: Cambridge University Press
  • Language: English
  • Identifier: ISSN: 2095-4719
    EISSN: 2052-3289
    DOI: 10.1017/hpl.2023.26
  • Source: Cambridge Open Access Journals
    Directory of Open Access Journals
    ProQuest Central
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