Fig. 1. Schematic illustration of the experimental setup. BS1–BS4, beam splitters; L1–L4, lenses; CM1 and CM2, curved mirrors; MPC, multi-pass cavity; DM1 and DM2, dispersive mirrors; ODL1 and ODL2, optical delay lines.

Fig. 2. Temporal characterization after compression. (a) Measured FROG traces. (b) Retrieved FROG traces. (c) Retrieved spectrum (red line) and phase (blue line) together with the measured spectrum (black line). (d) Temporal intensity (red line) and phase (blue line).

Fig. 3. (a) Schematic of the noncollinear BOC. M, mirror; BS, beam splitter; GP, glass plate; BBO1 and BBO2, beta barium borate crystals; PhD, photodetector. (b) Measured cross-correlation curves at 0.8 ps and 95 fs, respectively. (c) Timing drift of 0.8 ps when the feedback loop is off (gray line) and on (black line) together with the timing drift of 95 fs when the feedback loop is on (red line).

Fig. 4. (a) Schematic diagram of interference fringe intensity distribution with (red line) and without (black line) phase drift (inset shows the coherently combined). (b) Time difference when the BOC system is ON and when both BOC and interferometry are ON.