5 November 1998 Packaged digital holographic data storage with fast access
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Abstract
Recent investigations in holographic mass memory systems have produced proof of concept demonstrations that have highlighted their potential for providing unprecedented capacity, data transfer rates and fast random access performance. The exploratory nature of most such investigations have been largely confined to benchtop experiments in which the practical constraints of packaging and environmental concerns have been ignored. We have embarked on an effort to demonstrate the holographic mass memory concept by developing a compact prototype system geared for avionics and similar applications which demand the following features (mostly interdependent factors): (1) solid state design (no moving parts), (2) fast data seek time, (3) robust with respect to environmental factors (temperature, vibration, shock). In this paper, we report on the development and demonstration of two systems, one with 100 Mbytes and the other with more than 1 Gbyte of storage capacity. Both systems feature solid state design with the addressing mechanism realized with acousto- optic deflectors that are capable of better than 50 microseconds data seek time. Since the basic designs for the two systems are similar, we describe only the larger system in detail. The operation of the smaller system has been demonstrated in various environments including hand-held operation and thermal/mechanical shock and a photograph of the smaller system is provided as well as actual digital data retrieved from the same system.
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Jian Ma, Tallis Y. Chang, Sung Choi, John H. Hong, "Packaged digital holographic data storage with fast access", Proc. SPIE 3468, Advanced Optical Memories and Interfaces to Computer Storage, (5 November 1998); doi: 10.1117/12.330411; https://doi.org/10.1117/12.330411
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KEYWORDS
Crystals

Digital holography

Holography

Charge-coupled devices

Distortion

Holograms

Data storage

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