ON THE INFLUENCE OF THE DISPERSION OF ABSORPTION ON THE TIME DEPENDENCE OF A HOLONOMIC NARROW-BAND SIGNAL IN A DISPERSIVE MEDIUM FAR FROM THE POINT OF RADIATION

It is well known that when a narrow-band signal propagates in any medium with sufficient length of the path, amplitude-frequency spectrum inevitably begins to deform due dispersion absorption coefficient medium, is, dependence on frequency. Therefore, time «at infinity» significantly depends not only real part refractive index, but also absorption. In this work, we consider propagation and distortion holonomic homogeneous dispersive (by example weakly collisional plasma) taking into account dispersion. turns out manifests itself differently for different types signals – limited spectrum, which identically equal zero outside certain spectral interval, an unlimited does vanish increasing shown starting path leads shift carrier frequency towards lower normalization intensity, hence signal, becomes Gaussian at infinity. At same continues remain narrow-band. For narrowing «presses» it against boundary original spectrum. This time, as case “standardization” occurs, now arbitrary be Gaussian, “Lorentzian”.