512QAM Nyquist sinc-pulse transmission at 54 Gbit/s in an optical bandwidth of 3 GHz

作者：Schmogrow R^*; Hillerkuss D; Wolf S; Baeuerle B; Winter M; Kleinow P; Nebendahl B; Dippon T; Schindler P C; Koos C; Freude W; Leuthold J

来源：Optics Express, 2012, 20(6): 6439-6447.

DOI：10.1364/OE.20.006439

We demonstrate for the first time transmission of 54 Gbit/s and 48 Gbit/s over 44 km and 150 km, respectively, utilizing an optical bandwidth of only 3 GHz. We used polarization division multiplexed 512QAM and 256QAM modulation formats in combination with Nyquist pulse shaping having virtually zero roll-off. The resulting spectral efficiencies range up to 18 bit/s/Hz and 16 bit/s/Hz, respectively. Taking into account the overhead required for forward error correction, the occupied signal bandwidth corresponds to net spectral efficiencies of 14.4 bit/s/Hz and 15 bit/s/Hz, which could be achieved in a wavelength division multiplexed network without spectral guard bands.

• 出版日期2012-3-12