TY  - CHAP
T1  - High power two-micron fibre lasers
A1  - Clarkson,William A.
A1  - Abdolvand,A.
A1  - Shen,D. Y.
A1  - Hayward,R. A.
A1  - Cooper,L. J.
A1  - Williams,R. B.
A1  - Nilsson,J. 
AU  - Clarkson,William A.
AU  - Abdolvand,A.
AU  - Shen,D. Y.
AU  - Hayward,R. A.
AU  - Cooper,L. J.
AU  - Williams,R. B.
AU  - Nilsson,J. 
PB  - SPIE-International Society for Optical Engineering
CY  - Bellingham
PY  - 2003
Y1  - 2003
N2  - <p>A double-clad thulium-doped silica fibre laser, pumped by two beam-shaped diode-bars operating at 787-790nm, has yielded 14W of single-mode output at similar to2mum, with a slope efficiency with respect to launched power of 46%. Using a tunable laser configuration, comprising an external cavity with a diffraction grating, a maximum output power of 10.5W at 1921nm has been obtained, and wavelength tuning at multi-watt power levels over 215nm from 1855 to 2070nm has been demonstrated. The prospects for further improvement in performance will be discussed. In addition, a simple approach for further scaling of power levels from fibre lasers in the two-micron regime, based on intracavity wavelength combining of multiple fibre lasers is described. In a preliminary demonstration, four cladding-pumped thulium-doped silica fibre lasers are wavelength-combined yielding an output power &gt;14W. The prospects for further increase in output power via this approach will be discussed.</p>
AB  - <p>A double-clad thulium-doped silica fibre laser, pumped by two beam-shaped diode-bars operating at 787-790nm, has yielded 14W of single-mode output at similar to2mum, with a slope efficiency with respect to launched power of 46%. Using a tunable laser configuration, comprising an external cavity with a diffraction grating, a maximum output power of 10.5W at 1921nm has been obtained, and wavelength tuning at multi-watt power levels over 215nm from 1855 to 2070nm has been demonstrated. The prospects for further improvement in performance will be discussed. In addition, a simple approach for further scaling of power levels from fibre lasers in the two-micron regime, based on intracavity wavelength combining of multiple fibre lasers is described. In a preliminary demonstration, four cladding-pumped thulium-doped silica fibre lasers are wavelength-combined yielding an output power &gt;14W. The prospects for further increase in output power via this approach will be discussed.</p>
U2  - 10.1117/12.515806
DO  - 10.1117/12.515806
M1  - Conference contribution
SN  - 0-8194-4980-6
BT  - XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
T2  - XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
A2  - Wolinski,W.
ED  - Wolinski,W.
T3  - SPIE proceedings
T3  - en_GB
SP  - 482
EP  - 489
ER  -