[22p-C301-1~17] 3.6 Laser processing (formerly 3.7)

△ [22p-C301-8] Nonlinear Propagation Simulation of the Femtosecond Laser Pulse in Air for Quantitative Prediction of the Ablation Diameter

〇Ryohei Yamada¹, Wataru Komatsubara¹, Haruyuki Sakurai^1,2, Kuniaki Konishi¹, Norikatsu Mio¹, Junji Yumoto¹, Makoto Kuwata-Gonokami¹ (1.Graduate school of Science, The Univ. of Tokyo, 2.ISSP, The Univ. of Tokyo)

Keywords:femtosecond laser ablation, non-linear optical effect, laser ablation of metal

We have numerically simulated nonlinear propagation in air, which is a problem in laser ablation using sub-100 fs lasers, and explored the possibility of quantitatively predicting the ablation results. In this study, we have demonstrated a simulation method that can quantitatively predict the crater diameter over a two-orders of magnitude by comparing the simulation results using various models for the air ionization, which significantly affects the simulation results.