Abstract
We experimentally investigate the modulation format scalability & agility of a coherent add/drop node. Extinction of 25 dB yields OSNR penalties up to 1.1-dB for 3.2-GBd intra-format subcarrier add/drop up to 32QAM and 0.8-dB for inter-format 4QAM-by-16QAM add/drop.
© 2015 Optical Society of America
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