Microwave-induced frequency conversion of the resonant laser radiation

Resonant propagation of the laser radiation in a two-level medium in the presence of a microwave field is considered. Interaction of the microwave field with atoms leads to adiabatic modulation of atomic transition frequency via Stark or Zeeman effects. As the result the laser radiation interacts with frequency modulated atomic transition. On the basis of the density matrix equation for the matter and the plane-wave equation for the laser radiation This study shows that such a modulation leads to appearance of a specific multi-frequency optical wave that propagates through the medium with reduced resonant absorption (transparent mode).