Fig. 1: Sketch of the broadband UV DW generation mechanism, experimental and numerical simulation results.
From: Octave-wide broadening of ultraviolet dispersive wave driven by soliton-splitting dynamics
a Broadband UV DW generation mechanism in Ne-filled HCF. At a gas pressure of 5 bar, the zero-dispersion wavelength (ZDW) is 520 nm. The dynamics of soliton self-compression, UV DW emission, cross-phase modulation (XPM) caused by soliton-splitting effect, and octave-wide broadening of DW spectrum are illustrated at the bottom. b, c Measured and simulated spectra when pumped at 10 fs, 26 μJ, 766 nm (N = 3.9) (b) and 18 fs, 64 μJ, 781 nm (N = 7.8) (c). The HCF used in the experiment has a length of 42 cm and a core diameter of 100 μm and filled with 5 bar Ne gas. d Near-field beam profiles of UV DW at different wavelengths, measured using a CCD camera.
