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Generation of high-energy vacuum UV femtosecond pulses by multiple-beam cascaded four-wave mixing in a transparent solid

机译:在透明固体中通过多光束级联四波混合产生高能真空UV飞秒脉冲

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摘要

The generation of ultrashort vacuum UV (VUV) pulses by nondegenerate cascaded four-wave mixing of femtosecond pulses in a thin slide of a large band-gap transparent solid is numerically demonstrated. Using a novel noncollinear multiple-beam configuration, cascaded four-wave mixing of amplified 30 fs Ti:sapphire laser pulses at 800nm, and their second harmonic in lithium fluoride results in the generation of VUV radiation down to 134 nm with energies in the (mu)J range and durations comparable to those of the pump pulses. The proposed geometry is advantageous in large dispersion scenarios, namely for generating radiation close to absorption bands. Hence these results set this technique as a promising way to efficiently generate ultrashort VUV radiation in solids for several applications in science and technology.
机译:数值模拟了飞秒脉冲的非简并级联四波混合在大带隙透明固体的薄玻片中产生的超短真空紫外线(VUV)脉冲。使用新颖的非共线多光束配置,在800nm处放大的30 fs Ti:蓝宝石激光脉冲的级联四波混频及其氟化锂中的二次谐波导致产生低至134 nm的VUV辐射,能量为(μ )J范围和持续时间与泵浦脉冲的范围和持续时间相当。所提出的几何形状在大的色散情况下是有利的,即用于产生接近吸收带的辐射。因此,这些结果使这项技术成为有效地在固体中产生超短VUV辐射的有前途的方法,可用于科学和技术的多种应用。

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