Engineering Physics Annotation << Back On similarity of Laser ablation optical and gas dynamic characteristics E.Yu. Loktionov, Yu.Yu. Protasov Femtosecond laser ablation optical and gas dynamic characteristics investigation results are presented. Complex criterial parameters of laser ablation optical and gas dynamic performance similarity are proposed and experimental data on spectral and energy ablation thresholds, mass flow rate analysis results in a wide range of laser irradiation parameters (I0 ~ 103 – 1015 W/cm2, ? ~ 10-14 – 101 s, ? ~ 101 – 104 nm) are presented, that is necessary for laser ablation multifactor processes spectral and energy scaling. Keywords: similarity criteria, laser ablation, mass flow rate, momentum coupling coefficient. E-mail: stcpe@bmstu.ru