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The Promise of Optical Free-space Interconnections for Concurrent Memory Access

Hebrew University of Jerusalem. Department of Computer ScienceDror G. FeitelsonLarry Rudolph

出版	Leibniz Center for Research in Computer Science [Department of Computer Science], Hebrew University of Jerusalem, 1995
URL	http://books.google.com.hk/books?id=uRxGGwAACAAJ&hl=&source=gbs_api

註釋Abstract: "The concurrent-read concurrent-write (CRCW) model of shared memory for parallel computation is considered unimplementable in practice, due to limitations of electronic technology. But optical technology opens new possibilities that may overcome these limitations. An optical CRCW memory can be designed, in principle, based on the following ideas. First, optical free-space interconnections eliminate the need for shared switches that suffer from contention. Second, practically unlimited fan-in on detectors allows for concurrent writing without serialization. And third, retroreflective optical elements that reverse the propagation of beams of light implement concurrent reads without address decoding and sequential service. It should be noted, however, that the required technology is still immature, and much work is needed before a practical design is reached."