AT&T conducted trials in 2017 for business use of 400-gigabit Ethernet.[11] Researchers Robert Maher, Alex Alvarado, Domani Lavery, and Polina Bayvel of University College London were able to increase networking speeds to 1.125 terabits per second.[12] Christos Santis, graduate student Scott Steger, Amnon Yariv, Martin and Eileen Summerfield developed a new laser that potentially quadruples transfer speeds with fiber optics.[13]