Figure 2
From: Efficient High-Power Ultrashort Pulse Compression in Self-Defocusing Bulk Media
(a) Broadened spectra measured with an OSA. (b) Retrieved FROG traces with 97 fs (black line), 50 fs (blue line), 30 fs (red line) full widths at half maximum. The legend applies to (a,b). As a reference a sech2-shape spectrum and pulse corresponding to the oscillator input is shown. (c) M2 measurement of the beam behind the third broadening stage. (d) Focused beam profile extracted from the M2 measurement shown in (c).
