Power scaling of a 60% efficient, 793 nm pumped, 2 μm large mode area fibre laser

Abstract

A high-power diode-pumped thulium doped double-clad fibre laser has been developed to be used as a low-cost power scalable module. To date a power of 37 W, slope efficiency of 64%, and close to diffraction limited beam quality (M2 ~1.15) has been achieved.