Electro-optical characteristics of holographic grating in real time with voltage applied

The electro-optical changes of holographic gratings were analyzed when hologram formation was carried out in presence of applied voltage. Diffraction efficiency parameter of holographic gratings were studied in dichromated poly(vinyl alcohol) films and dichromated poly(vinyl alcohol) doped with nickel(II) chloride hexahydrate. The electrical changes of the materials were analyzed as a function of surface and volume resistivity.