Abstract
High power erbium-doped fiber amplifiers have a number of applications, including broadcast sources for cable TV, long distance repeaterless links, nonlinear optical switching, laser radar, remote sensing, and medicine. Considerable progress has been made to develop high power sources.1,2,3 We have demonstrated a 3-stage optical amplifier with 2 watts of output power at 1.5 μm, which we believe to be the highest reported output power for an erbium amplifier directly pumped with semiconductor lasers.
© 1995 Optical Society of America
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