With the distributed-side-coupled cladding-pumped (DSCCP) fiber of independent design, we firstly demonstrated a 3-kilowatt distributed side-pumped oscillator, to the best of our knowledge. An output power of 2.95 kW with a slope efficiency of 77.4% is obtained (M2 stimulated Raman scattering (SRS), transverse mode instability (TMI) and amplified spontaneous emission (ASE) component is observed in the output spectra.

© 2018 The Author(s)

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