High-power two-micron fiber lasers

William A. Clarkson; A. Abdolvand; D. Y. Shen; R. A. Hayward; L. J. Cooper; R. B. Williams; J. Nilsson

doi:10.1117/12.515806

10 November 2003 High-power two-micron fiber lasers

William A. Clarkson, A. Abdolvand, D. Y. Shen, R. A. Hayward, L. J. Cooper, R. B. Williams, J. Nilsson

Proceedings Volume 5120, XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; (2003) https://doi.org/10.1117/12.515806
Event: XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 2002, Wroclow, Poland

Abstract

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 ~2µm, 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 >14W. The prospects for further increase in output power via this approach will be discussed.

Citation Download Citation

William A. Clarkson, A. Abdolvand, D. Y. Shen, R. A. Hayward, L. J. Cooper, R. B. Williams, and J. Nilsson "High-power two-micron fiber lasers", Proc. SPIE 5120, XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, (10 November 2003); https://doi.org/10.1117/12.515806

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