We recorded real time holographic gratings in a photosensitive liquid material. This material is Norland Optical Adhesive (NOA 65®) mixed with yellow eosin dye. The NOA 65® is a clear, colorless, liquid photopolymer that cures when is exposed to ultraviolet light (UV) but when is mixed with yellow eosin becomes sensitive to visible region. To record the gratings we used the interference between two diode laser, obtaining gratings by refraction index changes. We use two different wavelengths, for recording the gratings and its highest diffraction efficient was obtained when the grating was illuminated with a wavelength.
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.
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