Inline frequency-non-degenerate phase-sensitive fibre parametric amplifier for fibre-optic communication

Error-free transmission of 2.5 Gbit/s data over 60 km of dispersion compensated standard single-mode fibre is demonstrated by using an inline phase-sensitive fibre-parametric amplifier and double-sideband data modulation format. The power penalty for the phase-sensitive amplifier was found to be < 0.5 dB compared to back-to-back for bit-error-rate > 10(-6) and < 2 dB compared to that for an equivalent phase-insensitive fibre-parametric amplifier of the same gain.