Group for Fibre Optics (GFO) The core research of our Group is oriented towards advanced applications of optical fibres that range from optical signal processing to sophisticated sensing techniques. General Information Contact Info Lab News Actively reducing noise by ionizing airPublished:31.05.23 — EPFL scientists show that a thin layer of plasma, created by ionizing air, could be promising as an active sound absorber, with applications in noise control and room acoustics.All news