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Noise measurements on a distributed erbium-doped fibre amplifier are reported for the first time. Data are presented for fibre lengths up to 54 km, and are in good agreement with theoretical predictions.<<ETX>>
The gain spectra for a bidirectionally pumped 30 km length of lightly doped dispersion shifted erbium fibre and the amplification performance in saturation of a 54 km length of similar fibre are presented. The longer length comprised six spliced fibres with an average erbium concentration in the core of approximately 60 p.p.b. and could be rendered lossless with 2*30 mW of pump power for low power...
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