Conversion of linearly polarized high-harmonic radiation into the circularly polarized in an optically modulated plasma-based X-ray laser: taking into account the nonlinearity and finite width of the harmonic spectral lines

Vladimir A. Antonov, Ilias R. Khairulin, Mikhail Yu. Ryabikin

The method proposed in [I.R. Khairulin et al., JETP Letters 117(9), 652 (2023)] for converting the linearly polarized radiation of high-order harmonics of an optical field into the…