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Duration of ultrashort pulses in the presence of spatio-temporal coupling

Abstract : We report on a simple method allowing one to decompose the duration of arbitrary ultrashort light pulses, potentially distorted by space-time coupling, into four elementary durations. Such a decomposition shows that, in linear optics, a spatio-temporal pulse can be stretched with respect to its Fourier limit by only three independent phenomena: nonlinear frequency dependence of the spectral phase over the whole spatial extent of the pulse, spectral amplitude inhomogeneities in space, and spectral phase inhomogeneities in space. We illustrate such a decomposition using numerical simulations of complex spatio-temporal femtosecond and attosecond pulses. Finally we show that the contribution of two of these three effects to the pulse duration is measurable without any spectral phase characterization.
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https://hal-iogs.archives-ouvertes.fr/hal-00617660
Contributor : Sébastien de Rossi <>
Submitted on : Monday, February 27, 2012 - 11:39:05 AM
Last modification on : Wednesday, August 7, 2019 - 2:34:15 PM
Document(s) archivé(s) le : Monday, May 28, 2012 - 2:20:58 AM

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Charles Bourassin-Bouchet, Michele Stephens, Sébastien de Rossi, Franck Delmotte, Pierre Chavel. Duration of ultrashort pulses in the presence of spatio-temporal coupling. Optics Express, Optical Society of America, 2011, 19 (18), pp.17357. ⟨hal-00617660⟩

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