Fine control of self-compression dynamics in a femtosecond filament

Autor:	Nickolai Zhavoronkov
Rok vydání:	2009
Předmět:	Protein filament Coupling Wavelength Optics Materials science Filamentation business.industry Femtosecond Chirp business Atomic and Molecular Physics and Optics Beam (structure) Spectral line
Zdroj:	Journal of Optics A: Pure and Applied Optics. 11:125201
ISSN:	1741-3567 1464-4258
DOI:	10.1088/1464-4258/11/12/125201
Popis:	The influence of spatial energy distribution in femtosecond laser beams on filamentary propagation in Ar and on evolution of the temporal shape and phases of the outgoing pulses were investigated. Beams with increased symmetry demonstrate more efficient energy coupling in the filament supporting development of a negative spectral chirp and producing broader spectra with a clear expressed shift towards shorter wavelengths. It is shown for the first time that modification of the spatial beam profile can perform fine control of compression dynamics resulting in spectral phase adjustment of the output pulses approaching the optimum for a given experimental configuration. As a demonstration, compression of initially 45 fs pulses down to 8.2 fs in a single-stage filamentation is provided.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::79b310e2af884bb8f098ad4e467b811d https://doi.org/10.1088/1464-4258/11/12/125201 Zobrazit plný text záznamu