Use of quasienergy states for laser-aided diagnostics of oscillatory electric fields in plasmas

Methods for the laser-assisted diagnostics of oscillatory electric fields (OEFs) in plasmas are considered. It is shown that several phenomena can be used for this purpose. First, a tunable laser radiation can scan both the structure of energy levels and spectral line profiles of atoms interacting with the OEFs. Second, the laser radiation can cause a saturation of the atomic transition, including the cases where the saturation parameter depends on characteristics of the OEFs. Third, the laser radiation itself can modify both the structure of energy levels and spectral line profiles in such a way that the modification would depend, in particular, on parameters of the OEFs.