
Then we present the regenerator architecture based on spectral shift followed by filtering and provide experimental evidence of bit error ratio improvement of a noisy signal from 3×10 -6 without regenerator to 2×10 -10 with regenerator. At first, we provide the theoretical basis that explains this improvement. This is in contrast with typical regenerators based on the usual principle of power conversion from a transfer function, which are unable to improve the bit error ratio. We demonstrate that an optical regenerator architecture providing re-amplification, re-shaping, and re-timing based on the principle of spectral shift followed by filtering can lead to bit error ratio improvement of the signal passing through it.

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