4×40 Gb/s 2 pJ/bit Optical RX with 8ns Power-on and CDR-Lock Time in 14nm CMOS. - Alessandro Cevrero; Ilter Özkaya; Thomas Morf; Thomas Toifl; M. Seifried; Frank Ellinger; Mohammad Mahdi Khafaji; Jan Plíva; Ronny Henker; Nikolay N. Ledentsov; J.-R. Kropp; V. A. Shchukin; et al. (OFC, 2018)