4D-CMA: Enabling Separation of Channel Compensation and Polarization Demultiplex
Fred Buchali, H. Bülow, Karsten Schuh, W. Idler · Optical Fiber Communication Conference · 2015
We propose a 4D-CMA feedback for butterfly filter adaptation enabling separation of channel compensation and polarization demultiplex. Using a digital polarization controller for demultiplex we demonstrate feasibility and ∼10-fold speed increase compared to standard CMA.