Figure 1
From: Ultrafast laser processing of materials: from science to industry
Beam focusing approaches: (a) a beam is focused on the surface or volume of a material; (b) an fs-beam is focused on liquid and forms a light filament suitable for processing of transparent and opaque workpieces at different axial locations or curvature of the surface. Reproduced with permission from Ref. 13. JLPS. All rights reserved.
