Dr. Andreas Tsigopoulos is a Professor at the Hellenic Naval Academy (2004-today) and has a Diploma in Electrical and Computer Engineering from the Department of Electrical and Computer Engineering, University of Patras, MSc from Telecom Paris, France and a PhD from the Department of Informatics and Telecommunications (1991) National Kapodistrian University of Athens. He is an expert in wireless optical communications (terrestrial and underwater), semiconductor optoelectronics, optical fiber communications, and electronic design. He is a Project Manager in the defence industry for the design and building of Mobile Command Centers and the Mobile Radiological Laboratory (2003-2005). He is an expert engineer and consultant for various telecommunications companies (1996-2003). He is a senior researcher of the Optoelectronics Group of the Informatics Department of the University of Athens (1991-1996). He is author or co-author of more than 70 papers in international journals and conference proceedings. He was an invited chairman and member of organizing and technical committees of many international conferences, reviewer of seven international scientific journals, auditor of various R&D projects, and chairman of the technical evaluation committees of various ICT European co-funded projects. His main research interests include free space optical communications and propagation, underwater wireless optical communications, semiconductor optoelectronics, and fiber-optic communications.