We demonstrate record 25.6-Tb/s transmission over 240 km using 160 WDM channels on a 50-GHz grid in the C+L bands. Each channel contains two polarization-multiplexed 85.4-Gb/s RZ-DQPSK signals, yielding a spectral efficiency of 3.2 b/s/Hz in each band.
- Differential quadrature phase shift keying
- High spectral efficiency
- Modulation formats
- Optical fiber communications
- Optical modulation
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics