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/Title(Long-haul optical transmission link using low-noise phase-sensitive amplifiers)
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/Subject(The capacity and reach of long-haul fiber optical communication systems is limited by in-line amplifier noise and fiber nonlinearities. Phase-sensitive amplifiers add 6 dB less noise than conventional phase-insensitive amplifiers, such as erbium-doped fiber amplifiers, and they can provide nonlinearity mitigation after each span. Realizing a long-haul transmission link with in-line phase-sensitive amplifiers providing simultaneous low-noise amplification and nonlinearity mitigation is challenging and to date no such transmission link has been demonstrated. Here, we demonstrate a multi-channel-compatible and modulation-format-independent long-haul transmission link with in-line phase-sensitive amplifiers. Compared to a link amplified by conventional erbium-doped fiber amplifiers, we demonstrate a reach 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 phase-sensitively amplified link transmits two data-carrying waves, thus occupying twice the bandwidth and propagating twice the total power compared to the phase-insensitively amplified link.)
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doi:10.1038/s41467-018-04956-5
Long-haul optical transmission link using low-noise phase-sensitive amplifiers
Samuel L.I. Olsson
Henrik Eliasson
Egon Astra
Magnus Karlsson
Peter A. Andrekson
Springer US
Nature Communications, doi:10.1038/s41467-018-04956-5
10.1038/s41467-018-04956-5
http://dx.doi.org/10.1038/s41467-018-04956-5
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Nature Communications
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Samuel L.I. Olsson
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Egon Astra
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Magnus Karlsson
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