"Optical fibers." . . "Comunicações opto-eletrônicas." . . "Laser." . . "Fibras ópticas." . . "Dotierung." . . "Telecomunicações." . . "Fibres òptiques Amplificador." . . "Włókna optyczne." . . "Fibra óptica." . . "Làsers." . . "Lasers." . "Telekomunikacja optyczna aparatura i sprzęt." . . "Amplificadores." . . "Erbium." . . "Amplificadores ópticos." . . "Fibres optiques." . . "Comunicação óptica (equipamentos)" . . "elektrotehnika telekomunikacije optične komunikacije optična vlakna optične naprave optični elementi optični ojačevalniki Erbijevi ojačevalniki EDFA aplikacije." . . . . . . . . . . . "Erbium doped fiber amplifiers : principles and applications" . . . . . . . . . . "Erbium-doped fiber amplifiers principles and applications" . . . "Erbium-doped fiber amplifiers device and system developments"@en . "Erbium-doped fiber amplifiers device and system developments" . . . . . . . . . . "Erbium-doped fiber amplifiers : Principles and applications" . . . "Erbium-doped fiber amplifiers : principles and applications"@en . "Erbium-doped fiber amplifiers : principles and applications" . "Erbium-doped fiber amplifiers : device and systems developments" . "Erbium-doped fiber amplifiers : device and system developments" . . "Erbium-doped fiber amplifiers : device and system developments"@en . . . . . . . "Erbium-doped fiber amplifiers"@en . . . . "Erbium-doped fiber amplifiers : principles and applications. Vol. 2" . . . . . . "Erbium-doped fiber amplifiers : device and system development" . . . . . . . . . . . . . . . . "Erbium-doped fiber amplifiers : devices and system developments" . . . . . . "Láseres." . . "Amplificateurs optiques." . . "fibre optique." . . . . "Wzmacniacze optyczne." . . "Télécommunications optiques Appareils et matériel." . . "Faserlaser." . .