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Proceedings Paper

Spectral, temporal, and spatial characteristics of plasma-induced self-phase modulation of a subpicosecond excimer laser pulse
Author(s): S. P. Le Blanc; Roland A. Sauerbrey; Stuart C. Rae; K. Burnett
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Paper Abstract

Plasma-induced self-phase modulation and cross-phase modulation in rare gases and air have been investigated using a femtosecond KrF excimer laser focused to peak intensities in the range 1014 - 1015 W cm-2. Spectral blueshifts of up to 2 nm are observed in the KrF laser spectrum which can be qualitatively modeled by assuming tunneling ionization and one-dimensional pulse propagation. When the degree of ionization Z << 1, pump-probe experiments and theoretical results indicate that field ionization occurs over a time equal to about half the pump pulse width. The pump-probe experiments also show that spatial defocusing causes the spectral blueshifting to be spatially dependent, in agreement with a two dimensional pulse propagation model. Plasma-induced cross-phase modulation can also be used to characterize the pulse width and chirp of an ultrashort laser pulse.

Paper Details

Date Published: 16 May 1994
PDF: 11 pages
Proc. SPIE 2116, Generation, Amplification, and Measurement of Ultrashort Laser Pulses, (16 May 1994); doi: 10.1117/12.175871
Show Author Affiliations
S. P. Le Blanc, Rice Univ. (United States)
Roland A. Sauerbrey, Rice Univ. (Germany)
Stuart C. Rae, Univ. of Oxford (United Kingdom)
K. Burnett, Univ. of Oxford (United Kingdom)

Published in SPIE Proceedings Vol. 2116:
Generation, Amplification, and Measurement of Ultrashort Laser Pulses
Rick P. Trebino; Ian A. Walmsley, Editor(s)

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