4.16 Tbit/s (104 /spl times/ 40 Gbit/s) unrepeatered transmission over 135 km in S+C+L bands with 104 nm total bandwidth

104 /spl times/ 40 Gbit/s unrepeatered transmission over 135.9 km is demonstrated on S+C+L bands (1492-1596 nm) using S-band lumped Raman amplifiers. The system implements distributed Raman pre-amplification over continuous bandwidth of 104 nm.