Reducing the self-focusing efficiency of a femtosecond pulse in a transparent medium with dispersion when the number of light vibrations in it is decreased

Берковский А.Н., Козлов С.А., Шполянский Ю.А. Уменьшение эффективности самофокусировки фемтосекундного импульса в прозрачной среде с дисперсией при сокращении в нем числа световых колебаний // Оптический журнал. 2008. Т. 75. № 10. С. 28–33.

Berkovskiy A.N., Kozlov S.A., Shpolyanskiy Yu.A. Reducing the self-focusing efficiency of a femtosecond pulse in a transparent medium with dispersion when the number of light vibrations in it is decreased [in Russian] // Opticheskii Zhurnal. 2008. V. 75. № 10. P. 28–33.

A. N. Berkovskiĭ, S. A. Kozlov, and Yu. A. Shpolyanskiĭ, "Reducing the self-focusing efficiency of a femtosecond pulse in a transparent medium with dispersion when the number of light vibrations in it is decreased," Journal of Optical Technology. 75 (10), 631-635 (2008). https://doi.org/10.1364/JOT.75.000631

This paper shows that, for light pulses composed of a small number of vibrations with the same maximum electric field and transverse size, i.e., with the same ratio of the radiation power to the critical self-focusing power, the self-focusing efficiency in a transparent disperse medium decreases when the number of vibrations in the pulse is decreased. For shorter pulses, because of the larger dispersion blurring, the size of the transverse narrowing at the focus turns out to be greater, while the radiation intensity is less.