Cladding-pumped ytterbium-doped large-core fiber laser with 610 W of output power

摘要

We report a cladding-pumped ytterbium-doped fiber laser, generating up to 610 W of continuous-wave (cw) output power at 1.09 μm with a slope efficiency of 82% and with a good beam quality (M~(2)=2.7). The core diameter was 43 μm and the inner cladding diameter was 650 μm. Even at this high power, the maximum output power was still limited by the available pump power, and no undesirable roll-over was observed in output power with increasing pump power.