Interconnects performed electronically are beginning to reach their limits as the chips are progressively increasing in size and speed. One problem is that of distribution of the same clock signal to several points on the wafer surface at the same instant. This has been addressed by the development of novel, self-focusing Fresnel-Dammann gratings, and Fresnel computer generated hologram fanout and focusing elements which have been demonstrated in a slanted axis, multiple reflection, planar optic configuration. The authors concentrate on the task of transferring data from one part of the chip to another in an optical bus i.e., transfer of an image. The optical interconnection is required to interchange the pixels between the input and the output in order to perform a perfect shuffle operation. This will enable multistage routing and sorting networks to be realised in a compact and rugged planar optic form.
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