Nelson Costa

Instituto de TelecomunicaçõesPortugal

Nelson M. S. Costa was born in Tomar, Portugal, in 1983. He received the “Licenciatura” degree in electrical and computer engineering in 2006 from the Instituto Superior Técnico (IST), Lisbon Technical University, Lisbon, Portugal, where he is currently pursuing the Ph.D degree in electrical and computer engineering.He is with the Group of Research on Optical Fibre Telecommunication Systems, Optical Communications Group, Instituto de Telecomunicações, Lisbon. His current research interests are advanced optical modulation formats and transmission impairments.

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Lasers and electro-optics is a field of research leading to constant breakthroughs. Indeed, tremendous advances have occurred in optical components and systems since the invention of laser in the late 50s, with applications in almost every imaginable field of science including control, astronomy, medicine, communications, measurements, etc. If we focus on lasers, for example, we find applications in quite different areas. We find lasers, for instance, in industry, emitting power level of several tens of kilowatts for welding and cutting; in medical applications, emitting power levels from few milliwatt to tens of Watt for various types of surgeries; and in optical fibre telecommunication systems, emitting power levels of the order of one milliwatt. This book is divided in four sections. The book presents several physical effects and properties of materials used in lasers and electro-optics in the first chapter and, in the three remaining chapters, applications of lasers and electro-optics in three different areas are presented

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