Laser-induced collective interactions under propagation of polychromatic radiation pulse through resonant optically dense extended medium without population inversion

Sergei N Bagayev, V. S. Egorov, Igor B. Mekhov +5 more

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIEMay 30, 20021 citation

Zhurnal Eksperimentalnoi i Teoreticheskoi Fiziki

Resonance effects in the interaction between a two-level system and intense polychromatic radiation

O. A. Kocharovskaia, Ia. I. Khanin, V. B. Tsaregradskii

Published Feb 1, 1984• 0 citations

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Laser-induced collective interactions under propagation of polychromatic radiation pulse through resonant optically dense extended medium without population inversion

Sergei N Bagayev, V. S. Egorov, Igor B. Mekhov +5 more

Experimental and theoretical investigation of the coherent propagation and amplification of polychromatic broadband laser pulses in optically dense resonant media without population inversion was carried out for the cases of plasma in a Ne glow discharge and a pulse discharge in Hg-Ar mixture. High density of Ne and Hg atoms in the metastable state (about 1012 cm-3), which was chosen to be the ground state of the two-level system under consideration, leads to the collective behavior of the atomic system in resonant electromagnetic field. The broadband probe field attenuation and the sideband amplification of the probe under the action of the coherent pump were observed. The amplification dependence on the pump intensity was obtained. The model of the parametrically enhanced collective interactions was developed and comparison the experimental data was made.Experimental and theoretical investigation of the coherent propagation and amplification of polychromatic broadband laser pulses in optically dense resonant media without population inversion was carried out for the cases of plasma in a Ne glow discharge and a pulse discharge in Hg-Ar mixture. High density of Ne and Hg atoms in the metastable state (about 1012 cm-3), which was chosen to be the ground state of the two-level system under consideration, leads to the collective behavior of the atomic system in resonant electromagnetic field. The broadband probe field attenuation and the sideband amplification of the probe under the action of the coherent pump were observed. The amplification dependence on the pump intensity was obtained. The model of the parametrically enhanced collective interactions was developed and comparison the experimental data was made.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIEMay 30, 20021 citation

N-1

high-frequency components with the frequencies close to or being in resonance with the atomic transition frequency, and a low-frequency component whose frequency coincides with the Rabi frequency of the high-frequency components, was considered. Special attention was given to the resonant bichromatic and nearly resonant trichromatic excitation. In the former case it was shown that by changing the intensity of the low-frequency component, one can efficiently alter spectral properties of the fluorescent radiation of the system in the high-frequency range, while in the latter case it was found that the fluorescent behavior of the system in question reveals a kind of an optoelectronic transistor effect. Options for the experimental detection and practical usage of the effects under study were discussed.