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Journal of Applied Spectroscopy

Effect of Velocity-Changing Gas Particle Collisions on the Temporal Shape of an Object Laser Pulse in Stimulated Echo-Hologram Responses

E. N. Ahmedshina, Leonid A. Nefediev, Guzel I. Garnaeva

Published May 1, 2017• 1 citation
Publisher
DOI
10.1007/s10812-017-0473-8

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Optics and Spectroscopy•Dec 1, 2013•1 citation
In this paper, we investigate the influence of collisions with the change of particle velocity direction in a gas on the reproduction of the temporary shape of the object laser pulse in the stimulated echo hologram response. Due to such collisions, the frequency shifts of the radiation of atoms in the gas randomly vary (spectral diffusion within the heterogeneously broadened line). It is shown, that such diffusion leads to the not correlated heterogeneous broadening in the gas at the different time intervals and the partial loss of system phase memory, which results in a partial loss of retrieved information encoded in the temporal form of the object laser pulse.
We have studied the information locking effect and the effect of correlation of the shape of an object laser pulse with the shape of a stimulated photon echo response in the presence of external spatially inhomogeneous electric fields. We have shown that, for the transition 3 H 4 - 3 P 0 in a LaF 3 :Pr 3+ crystal, one can observe the effect of the correlation of the shape of an object laser pulse with the shape of a stimulated photon echo response and, depending on the scheme of the action of external spatially inhomogeneous electric fields, either the information locking effect or the information destroying effect.