Variable Rate Transfer of Optical Information.
Patent Application, filed 24 Mar 93,
DEPARTMENT OF THE NAVY WASHINGTON DC
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In accordance with the present invention, a variable optical delay module is introduced within an optical ring to provide control of the data transfer rate and optical unity gain. Two optically addressed spatial light modulators of the ferroelectric liquid crystal based type, according to one embodiment, are utilized in the optical delay module to avoid corruption of the data within the optical ring. The data is stored in one of the spatial light modulators during data transfer to the other spatial light modulator so that neither modulator would be reading from itself to overwrite and corrupt its data. An image input impinges on one spatial light modulator producing a charge distribution within the spatial modulators which matches the local intensity of the image input. This charge distribution switches the orientation of the ferroelectric liquid if it exceeds a selected threshold charge magnitude
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