Max-Born-Institute for Nonlinear Optics and Ultrafast Spectroscopy, Max-Born-Strasse 2a, 12489 Berlin, Germany. beutler@mbi‐berlin.de
Opt Lett. 2011 Oct 1;36(19):3726-8. doi: 10.1364/OL.36.003726.
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.
我们展示了最新的研究结果，即在钛宝石激光基频与相对较窄带宽的三倍频脉冲成丝过程中，通过啁啾宽带脉冲的非共振四波混频产生超短真空紫外（VUV）脉冲。宽带闲频光的正啁啾产生了负啁啾 VUV 脉冲，以补偿 VUV 光束路径中 MgF2 窗口的材料色散。对于时间分辨实验，可提供超过 400nJ 的脉冲能量。通过 Xe 气体的泵浦探测电离测量脉冲持续时间，提供了五次谐波和基频之间的互相关。
