340 Gbit/s (32/spl times/10.66 Gbit/s) WDM transmission over 6,054 km using hybrid fiber spans of large core fiber and WDM fiber with low dispersion slope

To increase the transmission capacity in WDM systems, wider transmissible optical bandwidth and higher channel bit-rate are required. When the bandwidth and channel bit-rate increase, the interaction between nonlinearity and chromatic dispersion of the transmission fiber causes severe performance degradations after long-distance transmission. To reduce such degradations, it is effective to increase the effective cross-sectional area of the transmission fiber, i.e., a large core fiber (LCF) and/or to decrease the dispersion slope of the transmission fiber, i.e., a WDM fiber with low dispersion slope. In this paper, we report 340 Gbit/s WDM transmission over 6,054 km using hybrid combination spans of LCF and low dispersion slope WDM fibers (LDS-WDMF).