Figure 3
From: Direct compression of 170-fs 50-cycle pulses down to 1.5 cycles with 70% transmission
Comparison of the experimentally recorded spectrum (light blue shadow) and the simulated ones for a 6-m HCF at 2.2 bar. The simulations consider SPM only (dotted blue curve), all the Kerr terms only (dashed green curve), and all the Kerr terms including self-steepening (SS) (solid red curve).
