Title :
Experimental comparison of 32-and 64-QAM constellation shapes on a coherent PDM burst mode capable system
Author_Institution :
Alcatel-Lucent Bell Labs., Stuttgart, Germany
Abstract :
By introduction of an OFDM-based, data independent synchronization symbol, we implement a burst mode capable coherent transmission system. Experimental comparison of differently shaped 32-/64-QAM-constellations show a benefit up to 3 dB in OSNR-sensitivity for circular patterns.
Keywords :
OFDM modulation; light transmission; optical modulation; quadrature amplitude modulation; synchronisation; 32-QAM constellation; 64-QAM constellation; OFDM based synchronization; OFDM-based data independent synchronization symbol; OSNR-sensitivity; burst mode capable coherent transmission system; coherent PDM burst mode capable system; optical transmission system; polarization division multiplex; OFDM; Optical noise; Optical polarization; Optical receivers; Quadrature amplitude modulation; Signal to noise ratio;
Conference_Titel :
Optical Communication (ECOC), 2011 37th European Conference and Exhibition on
Conference_Location :
Geneva
Print_ISBN :
978-1-4577-1918-9
