Suppression of self-focusing for few-cycle pulsesстатья
Информация о цитировании статьи получена из
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 8 сентября 2021 г.
Аннотация:Intense beams of light propagating through a medium with a positive Kerr nonlinearity can undergo self-focusing provided that their average power is larger than a certain critical power determined by the wavelength and material properties of the medium. Here, we show that for pulses comprising only a few optical cycles, this self-focusing can be inhibited by the presence of significant (normal) dispersion. We derive simple expressions to quantify the threshold power for self-focusing in the presence of dispersion. In addition, we show that under certain conditions, this threshold power can be larger than conventional critical power (for a dispersionless case) by a factor as large as several hundred.