Propagation of resonance radiation in a gas cell and atomic diffusion

К. А. Баранцев, Г. В. Волошин, A. N. Litvinov +1 more

D. V. Kupriianov, Igor M. Sokolov, С. В. Субботин

V. V. Batygin, M. B. Gornyi, Boris G. Matisov

Dimitri Pappas, Nathan C. Pixley, Benjamin W. Smith +1 more

К. А. Баранцев, A. N. Litvinov, Е. Н. Попов

A theory of excitation of a coherent population trapping resonance in hot alkali-metal atoms in a cell with buffer gas is constructed, taking into account the finite spectral width of two-component radiation, its vector properties, and the hyperfine and Zeeman structures of atoms. The propagation of intermode correlations in an optically dense gas cell is studied. It is found that in the case of partially correlated input modes, their correlation degree at the output can increase. This effect can be used for filtering the incoherent part of radiation.

V. I. Romanenko, Alexander Romanenko, Леонід Петрович Яценко

We propose a diffusion model for the recently discovered diffusion-induced Ramsey narrowing arising when atoms diffuse in a buffer-gas cell in the laser radiation field. The diffusion equation for the coherence of metastable states coupled with an excited state by laser radiation of different frequencies in a three-level scheme of the atom-field interaction is obtained in the strong-collision approximation. The dependence of the shape of an absorption line near the transmission maximum of one of the frequencies on the two-photon resonance detuning for various geometries of the cell is investigated.