Abstract

Pump-probe measurements by IR-IR double resonance and other techniques have only looked at the dynamics of vibrationally excited SF₆ molecules in the pumping region or the lime evolution of energy relaxations in the excited molecules themselves. However the spatial evolution and dissipation of the vibrational energy in SF₆ molecules after being pumped by a CO₂ laser have scarcely been reported. Some investigation^4-5 have addressed only the density change resulting from V-T relaxation in the absorbing gas inside the laser beam and the sound-wave propagation outside.

© 1991 Optical Society of America