Propagation of a Cavity-Dumped CLaser Pulse through S
- 1 February 1970
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 1 (2), 225-230
- https://doi.org/10.1103/physreva.1.225
Abstract
Coherent interactions between short C laser pulses and a resonant absorbing S gas medium have been examined carefully, using a laser cavity-dumped rectangular pulse with a width of 20 nsec and input intensities from 10 to W/. Parameters studied included the width, shape, and delay time of the transmitted pulse after propagation through several absorption lengths of S cell. In addition to these measurements, we have observed two new phenomena, namely, optical free induction decay and edge echo, which are induced by this short rectangular C laser input pulse. Results indicate that although level degeneracy in S may be involved, the simple two-level model can account qualitatively for most observed phenomena, with the exception that the observed shape of a pulse deviates significantly from the symmetric hyperbolic-secant function predicted by the simple two-level theory. In the pulse region, we have demonstrated that the free-induction-decay tail can be valuable for studies of atomic and molecular collision processes.
Keywords
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