Paul Urquhart is a visiting professor in the Department of Electronic and Electrical Engineering of the Universidad Pública de Navarra (UPNA), Pamplona, Spain, where his research and teaching are on optical communications. He is also a visiting lecturer at the Hochschule Niederrhein, Krefeld, Germany and at ESIEE Paris, France, where he collaborates in research. Dr Urquhart was previously a professor in the Department of Optics at Télécom Bretagne, Brest, France and a senior research engineer at BT Laboratories, Ipswich, UK. He has had a long-standing association with the University of Essex, Colchester, UK, where he has taught optical communications and organised workshops for industry. Throughout his career he has participated in and lead research projects on optical amplifiers, filters and sources, as well as the design and simulation of optically amplified fibre networks for telecommunications and sensing. Paul Urquhart is a FEANI-registered European Engineer (Eur Ing), a member of the Institution of Engineering and Technology (IET) and a chartered engineer.