Nonlinear Resonances Free of Field and Doppler Broadenings

Yu I. Belousov, E. V. Podivilov, M. G. Stepanov, D. A. Shapiro

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


For the case where the Rabi frequencies of the guiding fields are much larger than the relaxation constants but much smaller than the Doppler broadening, it is shown that resonances which are neither field nor Doppler broadened can appear in the absorption (or gain) spectrum of the probe field. A classification of fourlevel systems according to the number of resonances is made for cases where two strong fields interact either with opposite or adjoining transitions. The conditions under which the number of resonances reaches eight, while for stationary atoms the maximum number is four, are found. A method is proposed for calculating the number of resonances in a multilevel system with several strong fields using analysis of the extremum points of the frequency branches in the velocity-frequency plane.

Original languageEnglish (US)
Pages (from-to)287-297
Number of pages11
JournalJournal of Experimental and Theoretical Physics
Issue number2
StatePublished - 2000

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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