KATHERINE PACHECO, SOHRAB AHMADI, GABRIELA ALDEA, REGIS BARILLE AND JEAN-MICHEL NUNZI

We report on Acridine orange as a sensitizer in combination with Acrylamide as the monomer with N,N’-dymethylacrylamide (DMAA) and N,N-methylenebisacrylamide (BSA) as the cross-linking monomer. Using DMAA alone, we get unstable gratings with low diffraction efficiency around 10% and spatial frequency of 1000 lines/mm. The performances of the photopolymer mixture are improved by replacement of DMAA with BSA, showing stable gratings with large diffraction efficiency around 40% and spatial frequency of 2000 lines/mm.