Similarity parameter for the process of mid-IR light bullet formation

We study the influence of the ratio of diffraction and dispersion lengths of a femtosecond mid-IR wave packet on the filamentation threshold power and the light bullet (LB) formation upon nonlinear optical interaction with solid-state dielectrics under the conditions of anomalous group velocity disp...

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Bibliographic Details
Published in:Quantum electronics (Woodbury, N.Y.) N.Y.), 2018-04, Vol.48 (4), p.366-371
Main Authors: Zaloznaya, E.D., Kompanets, V.O., Dormidonov, A.E., Chekalin, S.V., Kandidov, V.P.
Format: Article
Language:English
Subjects:
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
DIELECTRIC MATERIALS
DIFFRACTION
filamentation
FOCUSING
Group velocity
group velocity dispersion
INFRARED SPECTRA
light bullets
Process parameters
Similarity
similarity parameter
SOLIDS
threshold power
VISIBLE RADIATION
Wave diffraction
wave packet
WAVE PACKETS
WAVELENGTHS
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Summary:We study the influence of the ratio of diffraction and dispersion lengths of a femtosecond mid-IR wave packet on the filamentation threshold power and the light bullet (LB) formation upon nonlinear optical interaction with solid-state dielectrics under the conditions of anomalous group velocity dispersion. It is found that the ratio of the threshold power of filamentation and LB formation to the critical power of stationary self-focusing is independent of the radiation wavelength and the medium characteristics and is determined by the similarity parameter, equal to the ratio of the diffraction length to the dispersion one. With an increase in the similarity parameter, the threshold power of filamentation and light bullet formation increases.
ISSN:1063-7818
1468-4799
DOI:10.1070/QEL16634