3.2 Tb/s (80 /spl times/ 40 Gb/s) C-band transmission over 3 /spl times/ 100 km with 0.8 bit/s/Hz efficiency

We demonstrate 50 GHz-spaced 80 /spl times/ 40 Gbit/s WDM transmission over 300 km of TeraLight/spl trade/ fibre without polarisation demultiplexing, using the PSBT format. A record capacity of 3.2 Tbit/s is thus achieved over the C-band only, with a spectral efficiency of 0.8 bit/s/Hz.