Rui-Feng Lu et al 2009 J. Phys. B: At. Mol. Opt. Phys. 42 225601 doi:10.1088/0953-4075/42/22/225601
Rui-Feng Lu, Hai-Xiang He, Ya-Hui Guo and Ke-Li Han
Show affiliationsWe present a method of producing single attosecond pulses by using a few-cycle (5 fs) driving pulse with two additional weak control pulses. We discuss how single attosecond pulses produced from high-order harmonic generation processes in a synthesized three-colour laser field are similar to those processes in a much shorter single-colour laser field. Based on the high-order harmonic spectrum, classical ionizing and returning energy maps, time–frequency maps and time profiles of the attosecond pulses, the actions of the synthesized three-colour laser field are analogous to a 3 fs field although some differences still exist, and our method is proved to be a potential way to reduce the attosecond pulse duration from high-order harmonic generation with a currently available ultrafast laser source instead of a shorter pulse.
42.65.Ky Frequency conversion; harmonic generation, including higher-order harmonic generation
42.65.Re Ultrafast processes; optical pulse generation and pulse compression
Issue 22 (28 November 2009)
Received 21 July 2009, in final form 16 September 2009
Published 5 November 2009
Rui-Feng Lu et al 2009 J. Phys. B: At. Mol. Opt. Phys. 42 225601
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