Eurekalert July 5, 2018
The capacity and reach of long-haul fiber optical communication systems is limited by in-line amplifier noise and fiber nonlinearities. An international team of researchers (Sweden, Estonia) has demonstrated a multi-channel-compatible and modulation-format-independent long-haul transmission link with in-line phase-sensitive amplifiers with an improvement of 5.6 times at optimal launch powers with the phase-sensitively amplified link operating at a total accumulated nonlinear phase shift of 6.2 rad. The link transmits two data-carrying waves, thus occupying twice the bandwidth and propagating twice the total power compared to the phase-insensitively amplified link… read more. Open Access TECHNICAL ARTICLEÂ
Signal constellation diagrams comparing conventional amplification and phase-sensitive amplification in an amplifier noise limited regime. CREDIT: Samuel Olsson