Max-Born-Institute for Nonlinear Optics and Ultrafast Spectroscopy, 2A Max-Born-Strasse, D-12489 Berlin, Germany. mghotbi@mbi‑berlin.de
Opt Lett. 2010 Oct 15;35(20):3492-4. doi: 10.1364/OL.35.003492.
Generation of sub-50fs vacuum UV pulses with more than 2.5μJ energy at a 1kHz repetition rate is reported. The pulses at 160nm are produced using noncollinear difference-frequency four-wave mixing between the fundamental and third harmonics of an amplified Ti:sapphire laser in argon. While the pulse duration is maintained by increasing the phase-matching pressure, noncollinear interaction improves the conversion efficiency by 1 order of magnitude in comparison with the previous results in collinear geometry.
报道了一种重复频率为 1kHz 时输出能量超过 2.5μJ、脉宽小于 50fs 的真空紫外脉冲源。该 160nm 脉冲由放大的钛宝石激光基频和三倍频在氩气中的非共线差频四波混频产生。通过增加相位匹配压力，脉宽得以压缩，而非共线相互作用将转换效率与之前的共线实验结果相比提高了一个数量级。
