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Optical waveguides for on-chip optical interconnects

The increasing complexity of silicon integrated circuits are making global interconnects more difficult to achieve. It is predicted that, even at the high clock rates envisaged in future generations of chips, the propagation delays across the whole chip will amount to multiples of the clock period. Clock distribution and data transfer via optical waveguides offer a solution to this global interconnect problem. This paper examines the optical waveguide structures that would be suitable for these applications.