512QAM Nyquist sinc-pulse transmission at 54 Gbit/s in an optical bandwidth of 3 GHz.
512QAM Nyquist sinc-pulse transmission at 54 Gbit/s in an optical bandwidth of 3 GHz.
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DOI：
10.1364/oe.20.006439
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发表时间：
2012-03
期刊：
影响因子：
3.8
通讯作者：
R. Schmogrow;D. Hillerkuss;S. Wolf;B. Bäuerle;M. Winter;P. Kleinow;B. Nebendahl;T. Dippon;P. Schindler;C. Koos;W. Freude;J. Leuthold
中科院分区：
文献类型：
--
作者：
R. Schmogrow;D. Hillerkuss;S. Wolf;B. Bäuerle;M. Winter;P. Kleinow;B. Nebendahl;T. Dippon;P. Schindler;C. Koos;W. Freude;J. Leuthold
我们证明了第一次传输54 Gbit/s和48 Gbit/s超过44公里和150公里，分别利用光带宽只有3 GHz。我们使用偏振分多路复用512 QAM和256 QAM调制格式与具有几乎零滚降的奈奎斯特脉冲整形相结合。所得到的频谱效率范围分别高达18 bit/s/Hz和16 bit/s/Hz。考虑到前向纠错所需的开销，所占用的信号带宽对应于14.4比特/秒/赫兹和15比特/秒/赫兹的净频谱效率，这可以在没有频谱保护带的波分复用网络中实现。
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.