Pure-Rotational fs/ps CARS Measurements of Temperature and Concentration using a Second-Harmonic Bandwidth Compressed Probe

1 Figure 1. Energy level diagram for the fs/ps rotational CARS process: broadband femtosecond preparation pulses centered near 800 nm, and represented by thick red lines, prepare a Raman coherence at time t = 0. A frequency-narrow picosecond probe centered near 400 nm, and shown as a narrow blue line, probes the coherence at time delay t = , to yield CARS/CSRS signal shown as a thick blue line. Pure-Rotational fs/ps CARS Measurements of Temperature and Concentration using a Second-Harmonic BandwidthCompressed Probe