Abstract
Some experiments have already been presented for long haul transmission using in-line Erbium-Doped Fiber Amplifiers (EDFA) [1,2]. However, the question is to determine the actual system limitations for transoceanic links (up to 10,000 km), such as EDFA maximum output power, amplifier spacing, optical filter design. Some theoretical [3] and experimental [4] works have been published mainly with a recirculating loop.
© 1991 Optical Society of America
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