MULTIPLE-HOLOGRAM STORAGE FOR THIN-LAYERS OF METHYL-ORANGE DYES IN POLYVINYL-ALCOHOL MATRICES

We realized hologram storage within a 0.07-cm(2) light spot in thin la yers of polyvinyl alcohol matrices doped with Methyl Orange dyes preir radiated by the 488.0-nm Line of an Ar-ion laser with two orthogonal l inearly polarized 632.8-nm light beams. By rotation of the sample, mul tiple-hologram storage was achieved. By controlling the writing time, we have recorded three-hologram and five-hologram images in the same l ight spot. The mechanism of the multiple-hologram storage in Methyl Or ange-doped polyvinyl alcohol thin films is discussed.