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  1. Experimental investigation of ultrashort pulse laser-induced breakdown thresholds in aqueous media.

    Article - En anglais

    Laser-induced breakdown (LIB) thresholds are determined for pulse durations of 2.4 ps, 400 fs, and 100 fs at 580 nm in high purity water, saline and tap water.

    The dependence of LIB irradiance thresholds on pulse duration, optical wavelength, and focal volume is examined, and the experimental data obtained is compared with a theoretical model.

    The slopes of the probability curves calculated are compared with mechanisms for LIB, namely avalanche ionization, multiphoton initiated avalanche ionization, and multiphoton ionization.

    Lastly, the dependence of the peak breakdown electric field on pulse duration and focal volume is empirically determined and compared with previous work.

    Mots-clés Pascal : 4262B, Etude expérimentale, Oeil, Laser pulsé, Domaine temps ps, Domaine temps fs, Impulsion ultracourte, Rayonnement visible, Ophtalmologie, Ionisation multiphotonique, Disruption optique

    Mots-clés Pascal anglais : Experimental study, Eye, Pulsed laser, ps range, fs range, Ultrashort pulse, Visible radiation, Ophthalmology, Multiphoton ionization, Optical breakdown

    Logo du centre Notice produite par :
    Inist-CNRS - Institut de l'Information Scientifique et Technique

    Cote : 96-0223644

    Code Inist : 002A01C. Création : 199608.