Efficient high-order harmonic generation in a two-color laser field

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We report efficient high-order harmonic generation achieved using a two-color laser field. By inserting a second-harmonic generation crystal in the path of a converging laser pulse, the overall efficiency for high-harmonic generation was enhanced by more than an order of magnitude. In addition, even-order harmonics were also generated. The 2(2n+1)th -order harmonics were very strong and, in particular, the 38th harmonic (21.6 nm), obtained with a single laser shot of 2 mJ, saturated the X-ray charge-coupled device (CCD) of an extreme-ultraviolet spectrometer even with an Al filter of 1.5 mum thickness installed in front of the CCD.
Publisher
Springer Verlag (Germany)
Issue Date
2004-04-16
Keywords

TUNNELING; IONIZATION

Citation

Applied Physics B: Lasers and Optics, Vol. 78, No. 7-8, pp. 859-861

ISSN
0946-2171
DOI
10.1007/s00340-004-1453-2
URI
http://hdl.handle.net/10203/17761
Appears in Collection
PH-Journal Papers(저널논문)

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