Rejuvenated interest in exploiting linear optical processes within computing and signal processing architectures calls for reconsideration of its attributes and limitations. The objective of this work is a reassessment of various aspects of optics in computing in view of recent advances in computing concepts and technology. The main emphasis will be on the temporal aspects that are ignored in the majority of publications. Since the characteristics of a computing system are architecture- and application-dependent, the discussion will present various issues invoking special examples. The discussions are limited to the aspects of linear optics although a processing architecture may contain non-linear devices as well.
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