2.5 Gbit/s transmission over 4.5 km of 62.5 /spl mu/m multimode fibre using centre launch technique

The authors report the transmission of 2.5 Gbit/s NRZ signals over 62.5/125 /spl mu/m multimode fibre (MMF) over lengths of 4.5 km with a bit rate-distance product in excess of 11 Gbit/s km using a centre launch technique. Low penalties were measured for all fibres with /spl plusmn/7 /spl mu/m offset from the centre launch position.