Abstract
We demonstrated a high power all-fiber amplifier scheme with a closed fiber laser cavity experimentally. The characteristics of the signal light with 1100 nm are analyzed and discussed. 2.06 kW signal power with near diffraction-limited beam quality (M2 = 1.14) is obtained from the all-fiber amplifier, and the slope efficiency is about 71.5%.
© 2017 Optical Society of America
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