Rotational Relaxation Measurements and Resonant Phenomena in Laser- Excited Hydrogen Fluoride
Final rept. 1 Mar 1973-28 May 1974
ENVIRONMENTAL RESEARCH INST OF MICHIGAN ANN ARBOR
Pagination or Media Count:
Rates for the transfer of rotational energy R-R in vibrationally excited HF gas were measured using a single laser pump-probe technique. The relaxation time was found to be inversely proportional to HF pressure in the mTorr range and the self-relaxation rate constant was determined. Rotational relaxation of HF gas due to the presence of additive gases was observed. The relaxation rate for H2 was measured. The temporal evolution of HF laser pulses was examined and compared with the vibrational fluorescence of the laser discharge and the temporal gain of the discharge. The importance of hydrogen in the discharge is discussed. Reported observations of several resonant processes include bleaching, self-induced transparency, optical nutations, and an anomalous increase of 40 in the refractive index.
- Lasers and Masers
- Atomic and Molecular Physics and Spectroscopy