Optical fibers could serve the purpose of a high capacity link (several hundred Mbit/ sec) to interconnect many digital terminals. For example, several computers performing parallel computation or several multiplexed video channels would need a shared bus for the transmission of data. Such links would generally be short (1000 m at most) and would need very fast transmitters and receivers. Semiconductor lasers have been modulated at Gbit/sec rates, and fast optical receivers have been recently reported.1 We describe a simple, hybrid receiver built to operate at 500 Mbit/sec in the NRZ format.

© 1979 Optical Society of America

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