Abstract
We experimentally investigated optical signal-to-noise ratio (OSNR) enhancement in phase-sensitive amplifiers (PSA) at low gain levels. With balanced input signal-idler powers and OSNRs, nearly 3-dB OSNR improvement is obtained in a PSA with a PS gain as low as 6.4 dB, resulting in SNR improvement of 2.4 dB for 20-GBaud QPSK signal.
© 2021 The Author(s)
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