Direct measuring of single-cycle mid-IR light bullets path length in LiF by the laser coloration method
Institute of Spectroscopy RAS, Moscow, Troitsk, 108840 Russia
2 Irkutsk Branch of Institute of Laser Physics SB RAS, Irkutsk, 664033 Russia
3 Moscow Lomonosov State University, Physics Department and International Laser Center, Moscow, 119991 Russia
* corresponding author email@example.com
Published online: 31 October 2017
A colour-centre structure formed in a LiF crystal under filamentation of a femtosecond mid-IR laser pulse with a power slightly exceeding the critical power for self-focusing has been experimentally and theoretically investigated. A single-cycle light bullet was recorded for the first time by observation of strictly periodic oscillations for the density of the color centers induced in an isotropic LiF crystal under filamentation of a laser beam with a wavelength tuned in the range from 2600 to 3900 nm, which is due to the periodic change in the light field amplitude in the light bullet formed under filamentation under propagation in dispersive medium. The light bullet path length was not more than one millimeter.
© The Authors, published by EDP Sciences, 2017
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