Two-channel regime of investigation of the femtosecond photon echo's signals in the a doped polymer films at room temperature

The spectral pecularities of the femtosecond photon echo's signals are experimentally investigated in the polyvinylbutyral dye-doped film at room temperature by mean of the two-channel regime and detection. It is established that the spectra of the primary and stimulated photon echoes are shifted towards shorter wavelengths relative to the spectrum of the exciting femtosecond laser pulses.