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Space-division multiplexing (SDM) with multi-core/multi-mode fibers has potential to increase the transmission capacity drastically. In this paper, we investigate the feasibility of trans-oceanic transmission towards beyond 100 Tbit/s using multi-core fibers. Experimental results using 7-core fibers/EDFAs are also presented.
We compare the transmission performance of 413-Gb/s multi-band OFDM with 32-QAM (7%FEC) and 64-QAM (20%FEC) by simulations. The reachable distance with 64-QAM is longer than 32-QAM due to the filtering effects of 50-GHz-grid ROADMs.
Optical OFDM is a promising technology for highly spectrally efficient (SE) wavelength-division-multiplexing (WDM) system. Furthermore, the bit-rate 400 Gbit/s per WDM channel with SE of 8 bit/s/Hz is expected to be adopted for the next generation WDM system. For the application, optical OFDM is one of promising candidates because of the scalability for higher SE and higher bit-rate using multi-band...
Optical OFDM is one of promising technologies to increase a spectral efficiency. We demonstrated WDM transmission experiments of 458 Gbit/s OFDM signal per WDM channel with 8 bit/s/Hz spectral efficiency.
Optical OFDM is one of promising technology to increase spectral efficiency. We explain the modulation scheme and WDM transmission experiments of 458 Gbit/s OFDM signal per WDM channel with 8 bit/s/Hz spectral efficiency.
We have demonstrated 7 × 463-Gbit/s Optical OFDM transmission over 960 km of SSMF with EDFA-only amplification at 100-GHz WDM spacing. It is confirmed that the intra-channel penalty is dominant compared to inter-channel penalty.
Coherent OFDM is promising for DWDM transmission with higher spectral efficiency and enables a demonstration of the highest spectral efficiency of 7.0 bit/s/Hz. Optical OFDM technologies to increase a spectral efficiency are reviewed.
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