S. Sarmiento, J.A. Altabas, S. Spadaro, J. A. Lazaro, “From 4.2 Gbps AsymmetricalClipping(ACO)-OFDM to 8.7Gbps Layered-ACO-FBMC with Intensity-Modulation Direct-Detection for PONs“, Conference on Lasers & Electro-Optics (CLEO)/Europe, June 23-27, Munich, Germany.