Figure 5. (Top) Switched wavepacket optical Kerr effect signal from CO2 as a function of probe delay time at 300 Torr and 300 K. At ∆t < 0, the probe monitors the adiabatic alignment generated by the slowly rising edge of the aligning pulse. At ∆t > 0, the aligning pulse has been rapidly truncated, and field-free wavepacket revivals are seen with a spacing of 10.7 ps )1/8B. (Bottom) Fourier transform of the optical Kerr effect signal from CO2 at 300 Torr and 300 K. Combs indicating progressions of lines corresponding to the fundamental, difference, and sum frequencies are shown. Each progression consists of lines with a measured spacing corresponding to 8B, with B ) 0.39 cm-1.
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