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The capacity of transoceanic undersea transmission systems can be greatly increased by using erbium-doped fiber amplifiers (EDFAs) as undersea repeaters. Of the many transmission ‘experiments that have been performed using EDFAs,[1] [2] [3] the longest distance achieved to date transported a 2.4 Gb/s signal through a 2,200 km fiber that contained 25 EDFAs spaced every 80 km.[1] Extending the transmission length-of these experiments would require a large amount of hardware. Therefore, we have chosen to show feasibility of transoceanic EDFA systems by measuring the bit error rate (BER) after multi-thousand kilometer transmission using a circulating loop.
© 1991 Optical Society of America
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