Abstract
The work was performed by the laser coloration method which allows to investigate filaments produced by only one laser pulse with a spatial resolution of wavelength order and it is free of the drawbacks contributed by the irreproducibility of the laser pulse parameters from pulse to pulse which leads to essential distortion of the information obtained under data accumulation from many pulses. The method was first implemented for filaments in LiF produced by single femtosecond pulses of different intensities at spectral region from normal to anomalous group velocity dispersion (GVD). At the anomalous GVD formation of the light bullets was observed which were compressed up to a single optical cycle at the wavelength longer than 2600 nm 1. The view of the light bullet track, detected and studied on the luminescence of induced by this bullet long-lived color centres under the subsequent illumination by a cw laser, does not change with increasing laser pulse energy from the threshold of filament formation to the generation of the next LBs, the structure of which exactly coincides with that of the first one, thus confirming the bullet robustness.
© 2019 IEEE
PDF ArticleMore Like This
O. Fedotova, O. Khasanov, G. Rusetsky, T. Smirnova, E. Gaižauskas, and V. Kadan
EF_P_12 European Quantum Electronics Conference (EQEC) 2017
K.V. Lvov, S.Yu. Stremoukhov, and F.V. Potemkin
JW2A.119 CLEO: Applications and Technology (CLEO:A&T) 2018
Martin Kretschmar, Carsten Brée, Ayhan Demircan, Tamas Nagy, Heiko G. Kurz, Uwe Morgner, and Milutin Kovacev
HTu1C.2 High Intensity Lasers and High Field Phenomena (HILAS) 2014