Figure 8

Holes machined using (a) five 355-nm nanosecond pulses (duration of 30 ns, energy of 0.16 μJ)¹¹⁹, (b) five 800-nm femtosecond pulses (duration of 120 fs, energy of 0.12 μJ)¹¹⁹, (c) five femtosecond-nanosecond pulse pairs¹¹⁹, (d) an 800 nm femtosecond laser double-pulse train (duration of 50 fs, energy of 20 μJ) ¹²⁰. Reproduced from Ref. 119 (with the permission of OSA) and Ref. 120 (with the permission of OSA).