High-power, continuous wave, erbium-doped fiber laser pumped by a 1480 nm Raman fiber laser

We present a high power Er-doped fiber laser operating at 1555 nm, core pumped by a Raman fiber laser operating at 1480 nm. We achieve 55 W total output power for 67 W of pump power with a slope efficiency of 81%. To the best of our knowledge, this is the highest output power achieved from a core-pumped Er-doped (Yb free) fiber laser to date.