400 Mbit/s, 372 km Coherent Transmission Experiment Using In- Line Optical Amplifiers
01 January 1988
We report on an optical transmission experiment using four in-line optical amplifiers. With a net gain of 58 000 X (47.7 dB) from the amplifiers, we were able to increase the longest non- regenerated transmission distance to 372 km. the system penalty associated with the amplifiers was only 1.5 dB.