期刊
OPTICS EXPRESS
卷 31, 期 11, 页码 17848-17860出版社
Optica Publishing Group
DOI: 10.1364/OE.486561
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Spectrally incoherent laser pulses with large fractional bandwidth are needed to mitigate laser-plasma instabilities in high-energy laser-target interactions. A dual-stage high-energy optical parametric amplifier for broadband, spectrally incoherent pulses in the near-infrared was modeled, implemented, and optimized. The amplifier delivers close to 400 mJ of signal energy through noncollinear parametric interaction of 100-nJ-scale broadband, spectrally incoherent seed pulses near 1053 nm with a narrowband high-energy pump operating at 526.5 nm. Mitigation strategies for high-frequency spatial modulations caused by index inhomogeneities in the Nd:YLF rods of the pump laser are explored and discussed.
Spectrally incoherent laser pulses with sufficiently large fractional bandwidth are in demand for the mitigation of laser-plasma instabilities occurring in high-energy laser-target interactions. Here, we modeled, implemented, and optimized a dual-stage high-energy optical parametric amplifier for broadband, spectrally incoherent pulses in the near-infrared. The amplifier delivers close to 400 mJ of signal energy through noncollinear parametric interaction of 100-nJ-scale broadband, spectrally incoherent seed pulses near 1053 nm with a narrowband high-energy pump operating at 526.5 nm. Mitigation strategies for high-frequency spatial modulations in the amplified signal caused by index inhomogeneities in the Nd:YLF rods of the pump laser are explored and discussed in detail.
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