Figure 4
From: Enhancing precision in fs-laser material processing by simultaneous spatial and temporal focusing

Shadowgraphic images of the plasma formation (a, b) and subsequent disruptions (c, d), illustrating the strongly confined optical breakdown and reduced filamentation effects in the SSTF configuration (right column, b, d) compared to conventional focusing (left column, a, c ). Pump pulses incident from the left. SSTF, simultaneous spatial and temporal focusing.