Thorlabs' optical amplifiers for telecom applications are available as complete benchtop systems or as pigtailed butterfly packages. Our line of benchtop optical amplifiers includes praseodymium-doped fluoride fiber amplifiers (PDFAs) and erbium-doped fiber amplifiers (EDFAs). Our optical amplifiers available in pigtailed butterfly packages include InP/InGaAsP or GaAs/InGaAs semiconductor optical amplifiers (BOAs or SOAs) and high-speed optical switches.