Abstract

We present our work with coherent and incoherent dual-frequency experiments designed to measure detailed microscopic collisional dynamics in molecular gases. In the incoherent version, a laser pulse sequence consisting of two 180° pulses (each ~100 nsec long) is given. Each pulse has such a bandwidth that only a narrow range of velocities in the Doppler profile is excited. The first 180° pulse of frequency ω₁ will, therefore, excite only a select series of velocities, while at a later time the second 180° pulse of frequency ω₂ will invert population in another velocity range.

© 1985 Optical Society of America