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OPTICAL PARALLEL-ACCESS SHARED MEMORY SYSTEM - ANALYSIS AND EXPERIMENTAL DEMONSTRATION

机译：光学并行访问共享内存系统-分析和实验演示

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An optical implementation of a parallel-access shared memory uses a single photorefractive crystal and can realize the set of memory modules in a digital shared memory computer. This implementation uses two arrays of sources that are individually coherent but mutually incoherent from region to region across each array, and it permits incoherent/coherent double angular multiplexing of data in the crystal. A complete instruction set for its memory access consists of four operations, READ, WRITE, SELECTIVE ERASE, and REFRESH, which can be applied to any memory module independent of(and parallel with) instructions to the other memory modules. In addition, a memory module can execute a sequence of READ operations simultaneously with the execution of a WRITE operation to accommodate differences efficiently in optical recording and readout times common to optical volume storage media. An experimental shared memory system demonstrates two memory modules, each consisting of up to two Ei-bit data blocks, implemented in a single Fe:LiNbO3 crystal. The projected performance of the optical parallel-access shared memory system is analyzed and compared with conventional page-addressed volume holographic memories. [References: 37]
机译：并行访问共享存储器的光学实现使用单个光折变晶体，并且可以在数字共享存储计算机中实现一组存储模块。此实现使用两个源阵列，每个源阵列彼此独立，但每个阵列的区域之间相互不相关，并且它允许晶体中数据的非相干/相干双角度多路复用。用于其存储器访问的完整指令集包括四个操作，即READ，WRITE，SELECTIVE ERASE和REFRESH，它们可以应用于独立于其他存储器模块的指令（并与之并行）的任何存储器模块。另外，存储模块可以在执行写操作的同时执行一系列读操作，以有效地适应光学卷存储介质共有的光学记录和读出时间的差异。一个实验性的共享存储系统演示了两个存储模块，每个模块由多达两个Ei位数据块组成，并在单个Fe：LiNbO3晶体中实现。分析了光学并行访问共享存储系统的预计性能，并将其与常规的页面寻址的体积全息存储器进行了比较。 [参考：37]

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