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<title>Error-correcting codes for page-oriented optical memories</title>

1996; SPIE; Volume: 2848; Linguagem: Inglês

10.1117/12.256149

1996-756X

John F. Hutton, George A. Betzos, Maureen E. Schaffer, Pericles A. Mitkas,

Advanced Fiber Laser Technologies

Parallel optical memories have been proposed to meet high speed, high capacity storage requirements for input/output intensive computer applications. This technology offers the capability for storage and retrieval of optical data in 2D pages resulting in high capacity and high throughput. CUrrent raw bit error rates of experimental systems fall significantly short of the minimum industry requirement of 10 -12 for binary data. Thus, error control techniques for 2D data are necessary in order for such memories to be commercially feasible. In this paper, we discuss several error control schemes suitable for page- oriented data and specifically applicable to page-oriented optical memories. To better interface between the memory and the electronic host computer, we propose 'smart' photo- detector array devices in which the input is optical but the output is electronic. These arrays receive the optical signal form the memory and covert it to electronic data. Utilizing the speed of VLSI technology, the arrays perform fast parallel decoding and data correction, thereby providing an efficient optoelectronic interface between the memory and the electronic computer.