320 Gb/s (32/spl times/12.3 Gb/s) 410 km repeaterless WDM system ready for field deployment

We present a record-capacity of 320 Gb/s for 10 Gb/s-based repeaterless WDM transmission beyond 400 km. Using RZ-DPSK, a high-power booster, distributed Raman amplification and a third-order remotely pumped EDFA, the system exhibits enough margin to be deployment-ready.