HENNING BÜLOW is a distinguished member of technical staff in the Optical Networks Department at Bell Labs in Stuttgart, Germany. He received his Dipl.-Ing. degree in electrical engineering from the University of Dortmund,Germany, and a Ph.D. in electrical engineering from the University of Berlin for work on integrated optical switching matrices. During his two decades tenure with Alcatel-Lucent Bell Labs and formerly with its Research and Innovation Division, he has worked on erbium-doped fiber amplifiers, on the assessment transmission in the presence of polarization mode dispersion, on dynamic mitigation of transmission impairments by analog electronic, digital, or optical signal processing means, on coded modulation for coherent systems, and on mode multiplexing. He has authored or co-authored more than 130 conference and journal contributions, written three book chapters, and was member of technical program committee of the Optical Fiber Communication Conference and Exposition (OFC). From 2008 to 2011 he served as Guest Professor with the University of Erlangen-Nuremberg.