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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 16,
  • Issue 7,
  • pp. 1158-
  • (1998)

Theoretical Analysis of System Limitation for AM-DD/NRZ Optical Transmission Systems Using In-Line Phase-Sensitive Amplifiers

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Abstract

This paper shows the theoretically derived performance of single channel, amplitude modulation/direct detection optical transmission systems using in-line optical phase-sensitive amplifiers (PSA's). The calculations take into account the degradation of the signal-to-noise power ratio (SNR) and intersymbol interference (ISI) due to the distortion of transmitted signal pulses. The SNR is analyzed by considering not only amplifier noise and fiber loss but also noise enhancement by four-wave mixing in the transmission fiber. The ISI is estimated by eye-pattern degradation of the transmitted signal numerically calculated using the nonlinear Schrdinger equation. The regenerative repeater spacing of in-line PSA systems limited by SNR and ISI can be expanded by approximately 3 to 10 times that of in-line EDFA systems, in the case of { {|D|\;{ <= }\;}}{{0.1}} ps/nm/km dispersion fiber systems transmitting a 40-Gb/s signal.

[IEEE ]

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