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We have demonstrated a 100-Gb/s single channel transmission over the longest distance of 6,000 km ever reported using 2-subcarrier no-guard-interval PDM CO-OFDM. The unique DSP technology enabled to compensate for CD up to 109,200 ps/nm.
We propose two-stage overlap frequency domain equalization (OFDE) to compensate chromatic dispersion and polarization mode dispersion in practical long-haul optical systems. This paper evaluates the performance of 25-Gb/s coherent optical single-carrier transmission using two-stage OFDE.
We demonstrated spectrally efficient (2-b/s/Hz) 1Tb/s DWDM transmission of 111 Gb/s no-guard-interval PDM CO-OFDM signals over DSFs with 50 GHz spacing. The record transmission distance of 2100 km in the 100-Gb/s-data-rate CO-OFDM systems was achieved.
43-Gbit/s PMD-limited performances of CS-RZ and NRZ have been verified in a joint field trail. CS-RZ showed better performance than NRZ. 2/sup nd/-order PMD of 200 ps/sup 2/ was accommodated in principal state of polarization transmission with FEC.
PMD induced system outage probabilities have been measured in a joint field trial of NTT and DT. For outage evaluation 43-Gbit/s CS-RZ signals of the NTT WDM system were transmitted over selected high-PMD fiber links of DT's fiber network.
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