Mário F. S. Ferreira is a Professor at the Physics Department of Aveiro University, Portugal. Between 1990 and 1991 he was at the University of Essex, UK, performing experimental work on external cavity semiconductor lasers and nonlinear optical fiber amplifiers. His research interests have been concerned with the modelling and characterization of multi-section semiconductor lasers for coherent systems, quantum well lasers, optical fiber amplifiers and lasers, optical sensors, soliton propagation, polarization and nonlinear effects in optical fibers. He has been the leader of the Optics and Optoelectronics Group of the I3N – Institute of Nanostructures, Nanomodelling and Nanofabrication. He has written about 400 scientific journal and conference publications, and several books. He is a Fellow and a Travelling Lecturer of both OPTICA (Optical Society of America) and SPIE - The International Society for Optics and Photonics, and a Member of IEEE. He served in various committees of OSA/OPTICA and of SPIE, as well as in the organizing and scientific committees of various international conferences. Actually, he serves also as an Associate Editor or as an Advisor Board Member of several international journals in the area of optics and photonics.