Abstract

Previous nonrepeatered-system experiments have demonstrated that distances of 204, 226, and 273 km can be achieved at 5 Gbit/s with on-off modulated/direct-detection techniques employing post-and/or preamplifiers.^1-3 This paper presents an experiment in which a remotely amplified system is used to advance the above distances to 339 km of dispersion-shifted fiber for a total loss budget of 71.1 dB, without forward-error-correction coders (FEC). The span increase is accomplished by using a postamplifier launching 24.0 dBm in conjunction with an optically preamplified receiver and a remote amplifier for an additional 10.3-dB improvement. The system power budget can be increased by 3.6 dB with FEC. Hence, we have demonstrated a transmission distance of 339 km with a span budget of 71.1 dB at 5 Gbit/s.

© 1995 Optical Society of America