Self-induced phase gratings due to the inhomogeneous structure of acrylamide photopolymer systems used as holographic recording materials

Abstract

We report the observation of self-induced gratings or noise gratings in an acrylamide photopolymer for use in real time holography. The possibilities of this noise source as an optimization technique for this type of material are pointed out. Noise gratings in these polymer films were created upon exposure to a He–Ne laser collimated beam at 633 nm without any subsequent processing step. The influence of intensity on recording noise gratings and angular selectivity are reported showing its influence on the recording of this type of noise source in real time holographic materials.

Effect of acrylate monomers on the diffraction behavior of photopolymers fabricated with cellulose ester polymer binder

“…Further additive compounds used for the preparation of the photopolymer film samples were triethanolamine (TEA) and 2 0 ,4 0 ,5 0 ,7 0 -tetrabromofluorescein (TBF) that were already applied for similar systems [14,15].…”

Holographic scattering in phenanthrenequinone-doped poly(methyl methacrylate) bulk photopolymers

“…However the scattering noise became noticeable when the thickness was increased [9] . Noise gratings are initially formed from inhomogeneity in the recording material and the long interaction length in bulk sample take the noise grating to accumulating [10,11] .…”

Linear response deviations during recording of diffraction gratings in photopolymers

“…The indexmodul curve is 5 × 10 5 (n 1 (t)d) to compare the graphs. We also consider increasing light looses depending on exposure, thus the Γ factor decreases proportional to exposure [19]. DEsimulation is the diffraction efficiency calculated with Eq.…”