740 Gbit/s (37 x 20 Gbit/s) DWDM Transmission Experiment Using Er^(3+)-Doped Tellurite Fiber Amplifiers and Distributed Raman Amplification

We demonstrate 740 Gbit/s (37 x 20 Gbit/s) DWDM recirculating transmission experiment with 59 nm continuous bandwidth over 300 km by employing Er3+-doped tellurite fiber amplifiers. The use of Raman amplification is effective to increase the transmission bandwidth.