Advances in the development of few-cycle gigawatt-peak-power mid-IR optical parametric amplifiers pumped by Cr:Forsterite laser using non-oxide nonlinear crystalsстатья
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Дата последнего поиска статьи во внешних источниках: 15 мая 2024 г.
Аннотация:We demonstrate an experimental and theoretical comparison of non-oxide LiGaS2, HgGa2S4 and AgGaS2 crystals performance for wavelength conversion into the near and mid-IR range 1.5 – 8 µm in optical parametric amplifier pumped by Cr:Forsterite laser, delivering 100 fs pulses at 1.24 μm. It is shown that exceptionally high total energy conversion efficiency into the idler (4 – 5 µm) and signal (1.65 – 1.8 µm) waves up to 18% can be achieved using HGS crystal, providing high nonlinearity, while LGS crystal is more preferable for generating few-cycle mid-IR pulses due its unique dispersive properties. Our source features high peak power in gigawatt regime (0.4 – 2.4 GW) with pulse duration below 80 fs and optical synchronization with HHG and THz beamlines, which is ideal for pump-probe experiments of nonlinear and strong-field physics.