10 Gbit/s unrepeatered three-level optical transmission over 100 km of standard fibre

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Abstract
The use of duobinary optic signalling is proposed for extending the dispersion-limited propagation distances at 10 Gbit/s without the use of finely tuned dispersion compensation techniques. Experimental transmission system performance evaluation over 100 km of standard step-index fibre at l.55 μm has been achieved with a penalty of only 0.5 dB.