Experimental study of the acrylamide photopolymer with a pulsed laser

We have demonstrated that holograms may be recorded in polyvinyl alcohol/ac rylamide photopolymer dry films using pulsed laser exposure with a pulse le ngth of 8 ns. We also studied the effect of the pulse fluency together with the number of pulses necessary to obtain maximum diffraction efficiency. T he recording was performed using a holographic copying process. The origina l was a grating of 1000 lines/mm processed using silver halide sensitized g elatin. Diffraction efficiencies of 55% were obtained with sensitivities si milar to those reached with the same material and cw exposure, without the need for pre-processing or final processing of the gratings. (C) 2001 Publi shed by Elsevier Science B.V.