Frith, G.Lancaster, D.Jackson, S.2010-08-182010-08-182005Electronics Letters, 2005; 41(12):687-6880013-51941350-911Xhttp://hdl.handle.net/2440/59873An 85 W Tm³⁺-doped silica fibre laser is presented. To the best of the authors’ knowledge this is the highest output power achieved by pumping with 793 nm. The slope efficiency was 56%, the threshold 11 Wand the output wavelength centred at 2.04 µm. The high rate of cross relaxation in this laser provided a quantum efficiency of >130%.enCopyright IEE 200585 W Tm³⁺-doped silica fibre laser85 W Tm(3+)-doped silica fibre laserJournal article003000114310.1049/el:2005120765149