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We experimentally demonstrate mid-span spectral inversion (MSSI) of a Nyquist wavelength-division multiplexing (N-WDM) 526-Gb/s 16-QAM superchannel over an 800-km link. MSSI improves the robustness of blind carrier phase recovery in the nonlinearity-limited region.
We investigate benefits of practical mid-span spectral inversion in a broad band CO-OFDM system for increased transmission distance. Simulations show 70% increase in a 160-GHz wide 16-QAM OFDM super channel from 15×80-km to 26×80-km.
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