7 May 2013 Energetic study of focused ultrashort Gaussian beams
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An energetic study of focused ultrashort Gaussian beams was carried out using the Fresnel diffraction formulae in the frequency domain. Analysis of the encircled energy at the focused plane shows that diffraction spreading of a focused pulsed beam occurs in the limiting case of a ultrashort pulse by comparing it to a cw beam whose frequency is ωm which strongly contributes to the diffracted intensity rather than the carrier frequency ω0.
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L. Carretero, L. Carretero, P. Acebal, P. Acebal, S. Blaya, S. Blaya, A. Fimia, A. Fimia, R. Madrigal, R. Madrigal, "Energetic study of focused ultrashort Gaussian beams", Proc. SPIE 8780, High-Power, High-Energy, and High-Intensity Laser Technology; and Research Using Extreme Light: Entering New Frontiers with Petawatt-Class Lasers, 878028 (7 May 2013); doi: 10.1117/12.2017268; https://doi.org/10.1117/12.2017268


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