Fig. 8: White-light generation.
From: Optical parametric amplification of sub-cycle shortwave infrared pulses

a White-light spectra generated from a 3-mm CaF2 (blue solid curve), a 3-mm sapphire (green dotted curve), and a 3-mm YAG (brown one dot chain curve). The shaded area are error bars estimated from the statistics of the measured spectra and backgrounds. b Calculated group delay introduced by the CaF2 (blue solid curve), the sapphire (green dotted curve), and the YAG (brown one dot chain curve). The pump pulse profile calculated under the Fourier limit condition is depicted with the shaded area.