HOLOGRAPHIC CHARACTERIZATION OF AZO-DYE DOPED POLY(METHYL METHACRYLATE) FILMS

Many holographic techniques have been developed for non-destructive st udies and characterization of materials. In this paper, discussion wil l be made about the employed holographic technique to characterize the poly(methyl methacrylate) (PMMA) matrices doped with azodyes. In this manner we were able to study the effect of the thickness of the sampl es, the effect of concentration of the ate-dyes and of PMMA and the ef fect of aging (storage time) on the holographic efficiency (diffractio n efficiency) of these materials. Auto-erasable holographic gratings h ave been successfully recorded on ate-dye doped PMMA films and the dyn amic diffraction efficiency was monitored with light different from th at used for the recording.