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The realisation of optical computing depends ultimately on the development of materials which allows the interaction of two light beams at low intensity and on a short time scale. To date, only photorefractive materials can satisfy these requirements. However, photorefractive materials with the fastest response time, e.g. BSO (ms) and GaAs (µs), do not have large electro-optic coefficients and thus require an enhancement technique to be of any use.
© 1990 Optical Society of America
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