Distance limits of 10 to 20 Gbit/s FSK transmissionon standard fibre

Abstract
A simple analysis is performed on an FSK trasmission system using a high FM efficiency, high bandwidth DFB laser as a simple DFB transmitter and an FM/AM converter as an optical signal processor. It shows that optimum optical processing pushes the trasmission limits to 150 km at 10 Gbit/s and to 40 km at 20 Gbit/s.