Parameters of intense light channels during the postfilamentation stage of ultrashort laser radiation evolution

Abstract

Results of laboratory and numerical experiments on the multiple filamentation of high-power pulse Ti:Sapphire laser radiation (740 nm) in air are presented. The postfilamentation stage of pulse propagation in the form of intensive spatially localized light structures is investigated. The angular divergence of postfilamentation channels is studied under variation in the initial laser beam focusing. The threshold distance for the refilamentation of postfilamentation channels in a glass plate is measured.