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7 Jun 2004

Volume 84, Issue 23, pp. 4599-4816

Issue Cover Spotlight Figure

Appl. Phys. Lett. 84, 4650 (2004); http://dx.doi.org/10.1063/1.1759390 (3 pages)

David I. Woodward, Ian M. Reaney, Gaiying Y. Yang, Elizabeth C. Dickey, and Clive A. Randall
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Propagation of an intense femtosecond laser pulse through a thin foil filter

Kenichi Kinoshita, Alexei Zhidkov, Tomonao Hosokai, Takeru Ohkubo, and Mitsuru Uesaka

Appl. Phys. Lett. 84, 4623 (2004); http://dx.doi.org/10.1063/1.1758296 (3 pages) | Cited 4 times

Online Publication Date: 19 May 2004

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In order to improve the contrast of a nanosecond prepulse, the interaction of 12 TW, 50 femtosecond laser pulses with thin foil, as a filter, is investigated. Due to the collisional absorption, the prepulse produces rapidly expanding plasma and can lose 90% of its energy. At a properly chosen thickness of the filter, more than 60% of energy of the femtosecond main pulse is shown to be transmitted through the expanded underdense plasma with reduced prepulse contrast ratio. © 2004 American Institute of Physics.
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42.25.Bs Wave propagation, transmission and absorption
42.79.Ci Filters, zone plates, and polarizers
42.65.Re Ultrafast processes; optical pulse generation and pulse compression
52.50.Jm Plasma production and heating by laser beams (laser-foil, laser-cluster, etc.)
79.20.Ds Laser-beam impact phenomena
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