论文信息 - Optical representation of binary data based on both intensity and phase modulation with a twisted-nematic liquid-crystal display for holographic digital data storage.

Optical representation of binary data based on both intensity and phase modulation with a twisted-nematic liquid-crystal display for holographic digital data storage.

We propose a method of representing binary data by modulating both the intensity and the phase of beams with a twisted-nematic liquid-crystal display. With our method it is possible to reduce the dc component of the data image and thus improve the beam-intensity uniformity at the holographic recording plane when one is recording Fourier-plane holograms to obtain maximal areal storage density in disk-shaped storage media. The feasibility of our method is demonstrated experimentally.

J S Jang | D H Shin

[1] Bahaa E. A. Saleh,et al. Theory and design of the liquid crystal TV as an optical spatial phase modulator , 1990 .

[2] D Psaltis,et al. High-density recording in photopolymer-based holographic three-dimensional disks. , 1996, Applied optics.

[3] Dong-Hak Shin,et al. Holographic data storage by combined use of peristrophic, angular, and spatial multiplexing , 2000 .

[4] J Hong,et al. Influence of phase masks on cross talk in holographic memory. , 1996, Optics letters.

[5] J Yang,et al. Improving holographic data storage by use of an optimized phase mask. , 1999, Applied optics.

[6] Demetri Psaltis,et al. Holographic read-only memory , 2000 .

[7] Francis T. S. Yu,et al. Self-organizing optical neural network for unsupervised learning , 1990 .

[8] G W Burr,et al. Experimental study of the effects of a six-level phase mask on a digital holographic storage system. , 1998, Applied optics.