Photorefractive delay line for the visualization and processing of time-dependent signals.
We present an optical time-delay line based on photorefractive beam coupling in a rotating crystal. The delay line can be tapped continuously or at selected positions.We demonstrate a 64-channel device with a BaTiO(3) crystal rotating at 1.5 rpm, which gives approximately a 167-Hz bandwidth and 0.5 s of time delay for each channel.
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Zhou
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Anderson