Characterization Of The Dupont Photopolymer For 3-Dimensional Holographic Storage

DuPont's HRF-160 photopolymer film is investigated for use in three-dimensional holographic memories. Measurements of sensitivity, hologram persistence, the lateral spread of the photoinitiated reaction, and the variation of diffraction efficiency with modulation depth, spatial frequency and tilt angle, and intensity are reported. We observed that the diffraction efficiency of the HRF-150 photopolymer for a given exposure decreases with increases in intensity and grating tilt angle. nondestructively reconstructed for long periods of time at room temperature, reaction spread less than 100 mu m over a period of 16 h.