Dependence of laser-induced fluorescence on exciting-laser power: partial saturation and laser – plasma interactionJan Voráč, Pavel Dvořák, Vojtěch Procházka, Tomas Morávek and Jozef RáhelEur. Phys. J. Appl. Phys., 71 2 (2015) 20812DOI: https://doi.org/10.1051/epjap/2015150022