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An over 2200-km coherent transmission experiment at 2.5 Gb/s using erbium-doped-fiber in-line amplifiers

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3 Author(s)
Saito, S. ; NTT Transmission Syst. Labs., Kanagawa, Japan ; Imai, T. ; Ito, Takeshi

A 2223 km transmission distance was achieved with a 2.5-Gb/s heterodyne detection system that used erbium-doped-fiber in-line amplifiers and dispersion-shifted single-mode fibers. Twenty-five amplifiers, placed at approximately 80-km intervals, offered a total gain of more than 440 dB. Receiver sensitivity was -42.0 dBm, with only a 4.2-dB penalty from the initial sensitivity achieved by the back-to-back configuration

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Lightwave Technology, Journal of  (Volume:9 ,  Issue: 2 )