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In this paper, we investigate the properties of transmission links amplified by phase-sensitive amplifiers (PSAs). Using an analytic description, we explain the principles enabling improved sensitivity compared to conventional links amplified by phase-insensitive amplifiers (PIAs) and mitigation of nonlinear transmission distortions. We demonstrate these features using numerical simulations, and in...
We report the first use of low noise in-line phase-sensitive amplifiers in a long-haul circulating loop experiment. A reach extension of 200% compared to using EDFAs is observed with a 10 GBd QPSK signal.
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