Origin and Dynamics of the Shortwave Wing in the Spectrum of a Supercontinuum Generated by a Light Bullet of the Mid-IR Range
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The results are presented from investigating the light bullet spectrum in the filamentation of femtosecond pulses in calcium fluoride. A physical scenario is proposed for the generation of the anti-Stokes wing of the supercontinuum during the formation of the light bullet in the process of femtosecond filamentation in the mid-IR range.
Our experiments were performed on the unique Multipurpose Femtosecond Laser-Diagnostic Spectrometer Complex at the Institute of Spectroscopy, Russian Academy of Sciences. This work was supported by the grant from the Russian Science Foundation, project no. 18-12-00422.