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Diffraction Patterns of Si-based Polygonal Grating for 1-to-many Optical Interconnects

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Abstract

With the advent of higher clock speeds and distributed multiprocessor computer architectures, a great deal of interest has arisen in synchronously distributing a clock signal over all the processors in a computer with an acceptable clock skew [1]. Unfortunately, at clock speeds above 500 MHz, a synchronous global clock distribution system is very difficult to attain using electrical interconnects due to their inherent limitations. Because of the high bandwidth capability in optical signals, various guided wave optical clock distribution schemes have been investigated to alleviate such a problem. Photopolymer-based multiplexed volume holograms [2], surface relief gratings working at different diffraction orders [3] have been employed to achieve massive fanouts. However, due to the nature of non-multiplexibility, a surface relief grating is primarily employed as 1-to-l interconnect device with relatively low interconnectivity [4]. For 1-to-many fanout optical interconnects employing surface relief material with a single fanout node, a new device configuration is needed to solve this problem.

© 1996 Optical Society of America

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