A 56.1Gb/s NRZ modulated 850nm VCSEL-based optical link. - Daniel M. Kuchta; Clint L. Schow; Alexander V. Rylyakov; Jonathan E. Proesel; Fuad E. Doany; Christian W. Baks; B. H. Hamel-Bissell; Chris Kocot; L. Graham; R. Johnson; Gary Landry; E. Shaw; et al. (OFC/NFOEC, 2013)