Title :
Generation and Transmission of 21.4-Gbaud PDM 64-QAM Using a Novel High-Power DAC Driving a Single I/Q Modulator
Author :
Gnauck, Alan H. ; Winzer, Peter J. ; Konczykowska, Agnieszka ; Jorge, Filipe ; Dupuy, Jean-Yves ; Riet, Muriel ; Charlet, Gabriel ; Zhu, B. ; Peckham, David W.
Author_Institution :
Bell Labs., Alcatel-Lucent, Holmdel, NJ, USA
Abstract :
We generate a single-carrier 21.4-Gbaud polarization-division-multiplexed (PDM) 64-ary quadrature-amplitude-modulated (QAM) signal (256.8-Gb/s line rate) using a single in-phase/quadrature (I/Q) optical modulator driven by 8-level electrical waveforms from a novel high-power digital-to-analog converter (DAC). We measure a required optical signal-to-noise ratio of 29.5 dB (0.1-nm reference bandwidth; 10-3 bit-error rate), 4.6-dB off the theoretical limit. Using ultra-large-area fiber, we achieve 400-km single-channel transmission. The DAC was also used to obtain excellent results with quadrature-phase-shift-keyed and 16-QAM signals at 21.4 Gbaud.
Keywords :
digital-analogue conversion; error statistics; optical fibre communication; optical modulation; quadrature amplitude modulation; wavelength division multiplexing; 8-level electrical waveforms; DAC; PDM 64-QAM; bit rate 256.8 Gbit/s; digital-to-analog converter; optical signal-to-noise ratio; polarization division multiplexing; quadrature-phase-shift-keying; single I/Q modulator; wavelength-division multiplexing; Bit error rate; Optical filters; Optical noise; Optical polarization; Phase shift keying; Receivers; 100G ethernet; Coherent detection; optical networking; quadrature amplitude modulation (QAM); transmission; wavelength-division multiplexing (WDM);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2011.2175200
