3-kilowatt all-fiber distributed side-pumped oscillator with high SRS suppression

Abstract

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 ≈ 2.04). No stimulated Raman scattering (SRS), transverse mode instability (TMI) and amplified spontaneous emission (ASE) component is observed in the output spectra.