We present a preliminary investigation of introducing multi- phase clock signals into optoelectronic integrated circuits that we use to interface optical memories and electronic computers. The potential advantage of multiphase clocking is the enabling of faster pipelining and parallelism on the chip. Our study suggests that we could gain significant performance improvement for special applications such as database processing.
We have demonstrated an optoelectronic look-up table architecture using vertical-cavity surface-emitting laser- based logic. The system was implemented on a slotted plate understructure. An heterostructure photo-transistor-based optoelectronic XOR gate array was used to perform the necessary logic operations. The system's performance was satisfactory and based on the results we present here, we propose the design of a more compact version.
The output of parallel optical memories is a 2D set of data which propagates along the third dimension. Based on this characteristics we define a memory-computer optoelectronic interface and we analyze its functionality with respect to its degree of parallelism. Single-instruction multiple-data processing paradigms based on such interfaces are also discussed.
We present a storage scheme suitable for relational database operations such as projection, selection, join, and sorting. Relational database storage can be accomplished using optical memories such as two-photon 3D storage, volume holographic storage, spectral hole-burning memories, etc. Optoelectronic smart pixel arrays are used for data processing. The principles of the tomographic storage scheme and database operation algorithms are presented.
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