Recording holograms on color centers in CaF2:Na crystals by light with different wavelengths

The absorption spectra and holographic characteristics of a CaF2:Na crystal sample are measured at different wavelengths within the absorption band of colloidal centers, along with the same characteristics of the samples with holograms after their irradiation by incoherent UV light. Results of the study confirm the diffusion-and-drift mechanism of recording holograms on color centers in ionic crystals.