Spectrally Efficient Long-Haul WDM Transmission Using 224-Gb/s Polarization-Multiplexed 16-QAM

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...

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Veröffentlicht in:	Journal of lightwave technology 2011-02, Vol.29 (4), p.373-377
Hauptverfasser:	Gnauck, A H, Winzer, P J, Chandrasekhar, S, Liu, X, Zhu, B, Peckham, D W
Format:	Artikel
Sprache:	eng
Schlagworte:	100 G Ethernet Applied sciences Coherence Coherent detection Exact sciences and technology Information, signal and communications theory Low pass filters Modulation, demodulation Multiplexing Noise levels Optical crosstalk Optical fiber communications Optical fibers Optical filters optical networking Optical telecommunications Optical transmitters Quadrature amplitude modulation quadrature amplitude modulation (QAM) Signal and communications theory Signal to noise ratio Spectra Switches Switching theory Systems, networks and services of telecommunications Telecommunications Telecommunications and information theory transmission Transmission and modulation (techniques and equipments) Wavelength division multiplexing wavelength-division multiplexing (WDM)
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Zusammenfassung:	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.
ISSN:	0733-8724 1558-2213
DOI:	10.1109/JLT.2010.2080259