Time-division 4:1 multiplexing and 1:4 demultiplexing as well as signal regeneration are important functions in high-speed optical fibre transmission systems. It has been shown by experiments that these tasks can be solved up to about 6Gbit/s by using monolithic integrated circuits fabricated with a 2 μm standard bipolar technology.
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Rein et al. (1986) studied this question.
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