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Generation of intense sub-20-fs vacuum ultraviolet pulses compressed by material dispersion

机译:材料分散压缩产生20次以下fs强烈的紫外紫外线脉冲

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We present our latest results on the generation of ultrashort vacuum UV (VUV) pulses by nonresonant four-wave mixing of chirped broadband pulses generated by filamentation of the fundamental of a Ti:sapphire laser with relatively narrowband pulses at the third harmonic. Positive chirp at the broadband idler yields negatively chirped VUV pulses necessary to compensate for material dispersion of a MgF_(2) window in the VUV beam path. Pulse energies exceeding 400 nJ are available for time-resolved experiments. Pulse duration is measured by pump-probe ionization of Xe gas, providing the cross correlation between the fifth harmonic and the fundamental.
机译:我们介绍了最新的结果,该结果是通过对Ti:蓝宝石激光器的基波进行细丝化而产生的relatively宽带脉冲的非谐振四波混频产生的超短真空UV(VUV)脉冲,三次谐波具有相对较窄的脉冲。宽带惰轮处的正chi产生负chi VUV脉冲,以补偿VUV光束路径中MgF_(2)窗口的材料色散。超过400 nJ的脉冲能量可用于时间分辨实验。脉冲持续时间通过氙气的泵浦探针电离来测量,提供了五次谐波与基波之间的互相关性。

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