17 June 2004 Shared-hardware alternating operation of a superparallel holographic optical correlator and a superparallel holographic RAM
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Abstract
For practical pattern recognition and tracking systems, it is often useful to have a high-speed random access memory (RAM), which complements a holographic correlator. Recently, we have demonstrated a super-parallel holographic optical correlator, which uniquely identifies N images from a database using only 2 number of detector elements. In this paper, we show how this correlator architecture, operated in reverse, may be used to realize a super-parallel holographic random access memory. We present preliminary results establishing the feasibility of the super-parallel holographic random access memory, and show that essentially the same set of hardware can be operated either as the super-parallel holographic optical correlator or as a super-parallel holographic random access memory, with a minor reorientation of some of the elements in real time. This hybrid device thus eliminates the need for a separate random access memory for a holographic correlator based target recognition and tracking system.
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Mark Andrews, M. Selim Shahriar, Renu Tripathi, Mohammad Huq, John T. Shen, "Shared-hardware alternating operation of a superparallel holographic optical correlator and a superparallel holographic RAM", Proc. SPIE 5362, Advanced Optical and Quantum Memories and Computing, (17 June 2004); doi: 10.1117/12.543263; https://doi.org/10.1117/12.543263
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