Spectral EfficiencyAdaptive Optical Transmission Using Time Domain Hybrid QAM for Agile Optical Networks
Journal of Lightwave Technology, Vol. 31, Issue 15, pp. 26212628 (2013)
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Abstract
We report the transmission of time domain hybrid QAM (TDHQ) signals for agile optical networks. A continuous tradeoff between spectral efficiency and achievable distance by mixing modulation formats including QPSK, 8QAM, and 16QAM is demonstrated in two scenarios: 1) 28 Gbaud nonreturntozero (NRZ) signal for fixed 50 GHz grid systems; 2) superchannel transmission at date rates of up to 1.15 Tb/s and spectral efficiencies of up to 7.68 b/s/Hz. The TDHQ signal is generated using highspeed digitaltoanalog converters (DACs) at the transmitter, and lowcomplexity digital signal processing (DSP) is proposed for processing the TDHQ signals at the receiver. Moreover, the nonlinearity tolerance of hybrid QAM signals with different configurations is investigated.
© 2013 IEEE
Citation
Qunbi Zhuge, Mohamed MorsyOsman, Xian Xu, Mathieu Chagnon, Meng Qiu, and David V. Plant, "Spectral EfficiencyAdaptive Optical Transmission
Using Time Domain Hybrid QAM for Agile Optical Networks," J. Lightwave Technol. 31, 26212628 (2013)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt31152621
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