• High Power Laser Science and Engineering
  • Vol. 13, Issue 2, 02000e20 (2025)
Grigory Kurnikov1,2, Mikhail Volkov1,*, Anton Gorokhov1, Ivan Kuznetsov1..., Evgeny Perevezentsev1 and Ivan Mukhin1|Show fewer author(s)
Author Affiliations
  • 1Federal Research Center A.V. Gaponov-Grekhov Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia
  • 2Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, Russia
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    DOI: 10.1017/hpl.2025.2 Cite this Article Set citation alerts
    Grigory Kurnikov, Mikhail Volkov, Anton Gorokhov, Ivan Kuznetsov, Evgeny Perevezentsev, Ivan Mukhin, "Thermal-lens-free active-mirror ytterbium-doped yttrium aluminum garnet amplifier," High Power Laser Sci. Eng. 13, 02000e20 (2025) Copy Citation Text show less

    Abstract

    A new method is developed for suppressing thermally induced wavefront distortions of the radiation in the active element of disk geometry. The method is based on controlling radial temperature gradients in the active element using a profiled heatsink. An active element with a zero thermal lens developed on the basis of numerical simulation was experimentally demonstrated in a disk laser head. Higher-order phase aberrations in the active element with a profiled heatsink were weaker than in the element with a flat heatsink. Using this method, a thermal-lens-free active-mirror ytterbium-doped yttrium aluminum garnet amplifier with an output energy of 54 mJ at an average pump power of 100 W and a repetition rate of 106 Hz was implemented.
    χ=|ΩEinEoutdS|2Ω|Ein|2dSΩ|Eout|2dS=|Ωexp(i5φ(x,y))dS|2Ω2. ((1))

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    M2=2πλσ0θ; ()

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    σ2(z)=I(x,y,z)(x2+y2)dxdyI(x,y,z)dxdy=σ02+θ2z2; ()

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    I(x,y,z)(x0x+y0y)dxdy=def0. ((2))

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    Grigory Kurnikov, Mikhail Volkov, Anton Gorokhov, Ivan Kuznetsov, Evgeny Perevezentsev, Ivan Mukhin, "Thermal-lens-free active-mirror ytterbium-doped yttrium aluminum garnet amplifier," High Power Laser Sci. Eng. 13, 02000e20 (2025)
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