Continuous wave Erbium-doped fiber laser with output power of >100 W at 1550 nm in-band core-pumped by a 1480nm Raman fiber laser

A CW Erbium-doped fiber laser with >100W at 1554nm is demonstrated. The laser is core-pumped in-band by a Raman fiber laser with record power of >140W at 1480nm. The total conversion efficiency is ∼75%.