CHARACTERIZATION OF THE DUPONT PHOTOPOLYMER FOR 3-DIMENSIONAL HOLOGRAPHIC STORAGE

DuPont's HRF-160 photopolymer film is investigated for use in three-di mensional holographic memories. Measurements of sensitivity, hologram persistence, the lateral spread of the photoinitiated reaction, and th e variation of diffraction efficiency with modulation depth, spatial f requency and tilt angle, and intensity are reported. We observed that the diffraction efficiency of the HRF-150 photopolymer for a given exp osure decreases with increases in intensity and grating tilt angle. no ndestructively reconstructed for long periods of time at room temperat ure, reaction spread less than 100 mu m over a period of 16 h.