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Guided-Wave Chip-To-Chip Optical Interconnections

Silica-waveguide based optical interconnections for both LSI chip-to-chip data transmissions and optical clock signal distributions are described. The optical interconnection circuit is composed of waveguide paths, a waveguide mixer, laser diodes and photodiodes. The interconnection network is based on LAN star coupler network to perform both broadcast data transmissions and clock distributions. In an experimental 4-chip optical interconnection circuit, a possible signal bit rate estimated from measured receiving optical level was 500 Mbps. In the data transmission and clock distribution experiments, 170 Mbps data rate and 250 Mbps clock rate were confirmed.