Thorlabs' optical amplifiers for telecom applications are available as complete benchtop systems or as pigtailed butterfly packages. Our line of benchtop optical amplifiers includes a praseodymium-doped fluoride fiber amplifier (PDFA) 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.