Title :
Spectrally Efficient Long-Haul WDM Transmission Using 224-Gb/s Polarization-Multiplexed 16-QAM
Author :
Gnauck, A.H. ; Winzer, P.J. ; Chandrasekhar, S. ; Liu, X. ; Zhu, B. ; Peckham, D.W.
Author_Institution :
Bell Labs., Alcatel-Lucent, Holmdel, NJ, USA
Abstract :
We discuss the generation, wavelength-division-multiplexed (WDM) long-haul transmission, and coherent detection of 224-Gb/s polarization-division-multiplexed (PDM) 16-ary quadrature amplitude modulation (16-QAM) at a line rate of 28 Gbaud. We measure a required optical signal-to-noise ratio of 23.4 dB (0.1-nm reference bandwidth; 10-3 bit-error ratio), 3.4-dB off the theoretical limit. Using ultra-large-area fiber, we achieve 2000-km single-channel transmission. We also demonstrate 1200-km WDM transmission on a 50-GHz grid (4-b/s/Hz spectral efficiency), including three passes through a wavelength-selective switch.
Keywords :
error statistics; optical fibre communication; optical fibre polarisation; quadrature amplitude modulation; wavelength division multiplexing; bit rate 224 Gbit/s; bit-error ratio; coherent detection; distance 1200 km; distance 2000 km; frequency 50 GHz; long-haul WDM transmission; optical signal-to-noise ratio; polarization-division-multiplexing; polarization-multiplexed 16-QAM; quadrature amplitude modulation; reference bandwidth; single-channel transmission; spectral efficiency; ultralarge-area fiber; wavelength-division-multiplexing; wavelength-selective switch; 100 G Ethernet; Coherent detection; optical networking; quadrature amplitude modulation (QAM); transmission; wavelength-division multiplexing (WDM);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2010.2080259
