Mitkas P A, Irakliotis L J, Beyette F R, Feld S A, Wilmsen C W
Appl Opt. 1994 Mar 10;33(8):1345-53. doi: 10.1364/AO.33.001345.
Database processing, like the majority of nonnumerical applications, exhibits a high degree of functional parallelism but does not require complex operations; therefore it is amenable to optical solutions. The architecture of an optoelectronic filter that is capable of performing selection and projection operations on a two-dimensional data array in a relational database environment is presented. The system receives input from a parallel optical memory, one page at a time, and performs logic operations by using optoelectronic smart pixels based on heterostructure phototransistors and vertical-cavity surfaceemitting lasers. Combinations of AND and XOR gates are used to realize row-lcolumn masking and comparisons of input data against user-supplied search arguments. The main goal of the filter is to reduce the effective data rate between the highly parallel optical storage and the low input data rate conventional electronic computer, thus efficiently interfacing currently available photonic and electronic technologies.
与大多数非数值应用一样，数据库处理具有高度的功能并行性，但不需要复杂操作；因此它适合采用光学解决方案。本文介绍了一种光电子滤波器的架构，该滤波器能够在关系数据库环境中对二维数据阵列执行选择和投影操作。该系统一次从并行光存储器接收一页输入，并通过使用基于异质结构光电晶体管和垂直腔面发射激光器的光电子智能像素执行逻辑操作。与门和异或门的组合用于实现行/列掩码以及将输入数据与用户提供的搜索参数进行比较。该滤波器的主要目标是降低高度并行光存储与低输入数据速率传统电子计算机之间的有效数据速率，从而有效地连接当前可用的光子和电子技术。
