[20p-B205-1~15] 3.6 Laser processing (formerly 3.7)

1:45 PM - 2:00 PM JST(4:45 AM - 5:00 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[20p-B205-2] Control of the Ablation Crater Shape Using Effects of Nonlinear Propagation of Femtosecond Laser Pulses in Air

〇Ryohei Yamada¹, Wataru Komatsubara¹, Haruyuki Sakurai¹, Kuniaki Konishi¹, Norikatsu Mio¹, Junji Yumoto¹, Makoto Kuwata-Gonokami¹ (1.The Univ. of Tokyo)

Keywords:

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

We previously found that the ablation diameter can be quantitatively predicted by appropriately incorporating the nonlinear propagation effects of sub-100 fs laser pulse in air. In this study, we demonstrated that it is possible to control the ablation crater shape by clarifying the changes in the spatial distributions of sub-100 fs laser pulses by nonlinear propagation simulations in air.