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Mid-infrared lasers: Challenges imposed by the population dynamics of the gain system

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Mid-infrared lasers: Challenges imposed by the population

dynamics of the gain system

Markus Pollnau

Integrated optical MicroSystems Group, MESA+ Institute for Nanotechnology,

University of Twente, The Netherlands

Workshop on Mid-Infrared Fiber Laser Technology, Saint-Louis, France, 2010, paper 2

This paper discusses the influence of the population dynamics on mid-infrared lasers.

Specifically, the typically longer lifetime of the lower compared to the upper laser level has to be

addressed in order to achieve highly efficient laser operation in this wavelength range. Examples

of different operational regimes of the erbium-doped ZBLAN 3-µm laser are presented [1-4].

[1] M. Pollnau, Ch. Ghisler, G. Bunea, M. Bunea, W. Lüthy, and H.P. Weber, "150 mW unsaturated output power

at 3 µm from a single-mode-fiber erbium cascade laser", Applied Physics Letters 66 (26), 3564-3566 (1995).

[2] S.D. Jackson, T.A. King, and M. Pollnau, "Diode-pumped 1.7-W erbium 3-µm fiber laser", Optics Letters

24 (16), 1133-1135 (1999).

[3] M. Pollnau and S.D. Jackson, "Energy recycling versus lifetime quenching in erbium-doped 3-µm fiber lasers", IEEE Journal of Quantum Electronics 38 (2), 162-169 (2002).

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