Abstract
Optical quadrature amplitude modulation (QAM) is experimentally demonstrated with a low-complexity modulator based on a semiconductor optical amplifier and electroabsorption modulator. Flexible amplitude/phase format transmission is achieved. The applicability of octary QAM for coherent optical access networks with sustainable per-user bandwidth is investigated for a long reach of 100 km, and its compatibility with a potentially high split is verified.
© 2012 Optical Society of America
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