Measurement of the Bespalov-Talanov gain spectrum in a dispersive medium with large n2

摘要

Abstract: Conditions which seed the self focussing of high-power broadband laser beams are determined by examining growth rates for plane-wave perturbations on a strong pump field as a function of frequency and angle. Measurements verifying predictions of growth based on the linearized stability analysis of Bespalov and Talanov extended to broadband fields are reported. !10