DIGITAL FIBRE OPTIC COMMUNICATIONS LINK FOR 1 Gbit/s.

An experimental 1 Gbit/s fiber optic communications link is described. It uses a directly modulated Ga//xAl//1// minus //xAs double heterostructure injection laser as the optical source, a silica based single-fiber as the transmission line and a silicon avalanche photodiode as the optical receiver. The transmitter contains a multiplexer which interleaves four 250 Mbit/s channels into a 1 Gbit/s channel. The receiver contains circuits for signal waveform regeneration, for clock extraction and for demultiplexing the 1 Gbit/s signal into four parallel 250 Mbit/s channels. The arrangement of the link is described together with the experimental results obtained.