High-power 2-µm Tm3+-doped fibre lasers

Gavin P. Frith; David G. Lancaster; Stuart D. Jackson

doi:10.1117/12.580042

23 December 2004 High-power 2-μm Tm³⁺-doped fibre lasers

Gavin P. Frith, David G. Lancaster, Stuart D. Jackson

Proceedings Volume 5620, Solid State Laser Technologies and Femtosecond Phenomena; (2004) https://doi.org/10.1117/12.580042
Event: European Symposium on Optics and Photonics for Defence and Security, 2004, London, United Kingdom

Abstract

Using Tm³⁺-doped double-clad silica fibre we have produced high power, high efficiency 2μm lasers. To date we have achieved a 59% slope efficiency relative to launched pump power using single end pumping and double passing the pump light. By pumping the fibre laser from both ends, we achieved up to 118W peak output power with 54% slope efficiency relative to launched power at 25% duty cycle. The quantum efficiency of this laser was 120% relative to launched pump power, which we attribute to a cross-relaxation process in Tm³⁺ (³H₄,³H₆→³F₄,³F₄). We have also demonstrated fixed wavelength operation of the laser near 1.9μm by using fibre Bragg gratings.

Citation Download Citation

Gavin P. Frith, David G. Lancaster, and Stuart D. Jackson "High-power 2-μm Tm³⁺-doped fibre lasers", Proc. SPIE 5620, Solid State Laser Technologies and Femtosecond Phenomena, (23 December 2004); https://doi.org/10.1117/12.580042

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