Abstract
Long-span nonrepeatered transmission systems are quite attractive for constructing economical large-capacity networks because repeater facilities can be reduced. Erbium-doped fiber amplifiers (EDFAs) as power amplifiers and preamplifiers have dramatically enhanced transmission capabilities, especially repeater spacing.1,2 At high fiber-input powers, however, degradation caused by fiber nonlinear effects limit the repeater span.3
© 1994 Optical Society of America
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