Holographic gratings recorded with pineapple juice and artificial dye

Preliminary results, of holographic diffraction gratings recording are shown, which the polyvinyl alcohol mixed with a photosensitive agent salt (NH₄)₂CrO₇, and with an adequate quantity of pineapple juice, and synthetic dye. Dye as an element to increment the absorbance profile of the photosensitive material at emission line of 445nm. The diffraction gratings were recorded using laser diode at a wavelength of 445 nm.