1. School of Electrical and Computer Engineering, State University of Campinas, Campinas, Brazil
2. High Capacity Optical Transmission Laboratory, Electro-Optical Communications Group, Eindhoven University of Technology, Eindhoven, MB, The Netherlands
3. Eindhoven University of Technology, Eindhoven, MB, The Netherlands
4. NokiaBell Labs, Holmdel, NJ, USA
5. CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, FL, USA