Physics – Quantum Physics
Scientific paper
2000-05-23
Soviet Physics JETP 30 (1970) 466
Physics
Quantum Physics
revex, 7 eps figs; the paper discusses quantum interference effects in multilevel Doppler broadened schemes as a base for lasi
Scientific paper
Nonlinear effects in emission and absorption spectra of gaseous systems are considered. It is shown that level splitting can be detected spectroscopically even if it is below the Doppler width. Conditions for distinguishing interference effects from those due to nonequilibrium velocity distribution are determined. In the case of large Doppler broadening the correction for atomic motion is equivalent to the substitution of an "effective immobile atom" for the moving atom ensemble. The spectral manifestation of nonlinear effects is analyzed in detail. The influence of nonlinear interference effects on the generation characteristics in the presence of external field is investigated.
Popov Alexander K.
Popova Ya. T.
Rautian S. G.
Sokolovskii R. I.
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