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Ytterbium-doped large-core fiber laser with 1.36 kW continuous-wave output power

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Abstract

We have demonstrated a highly-efficient cladding-pumped ytterbium-doped fiber laser generating 1.36 kW of continuous-wave output power at 1.1 µm with 83% slope efficiency and near diffraction-limited beam quality. The laser was end-pumped through both fiber ends and showed no evidence of roll-over even at the highest output power, which was limited only by available pump power.

©2004 Optical Society of America

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Figures (2)

Fig. 1.
Fig. 1. YDFL experimental arrangement with two diode-stack pump sources. HR: high reflectivity, HT: high transmission.
Fig. 2.
Fig. 2. (a) Fiber laser output power vs. launched pump power. (b) Laser output spectrum at full power.
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