Hybrid 224-Gb/s and 112-Gb/s PDM-QPSK transmission at 50-GHz channel spacing over 1200-km dispersion-managed LEAF® spans and 3 ROADMs

@article{Xie2011Hybrid2A,
  title={Hybrid 224-Gb/s and 112-Gb/s PDM-QPSK transmission at 50-GHz channel spacing over 1200-km dispersion-managed LEAF® spans and 3 ROADMs},
  author={Chongjin Xie and Gregory Raybon and Peter J. Winzer},
  journal={2011 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference},
  year={2011},
  pages={1-3}
}
We transmit a mix of 224-Gb/s and 112-Gb/s PDM-QPSK channels at a 50-GHz spacing and 3-b/s/Hz spectral efficiency over 1200-km dispersion-managed LEAF® spans with 3 ROADMs and over 2000 km without ROADMs.