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High-energy resonantly diode-pumped Q-switched \(\hbox {Ho}^{3+}\):YAG laser

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Abstract

We report on a Q-switched \(\hbox {Ho}^{3+}\):YAG laser resonantly pumped by fiber-coupled high-spectral-brightness laser diodes emitting at \(1.91~\upmu {\hbox {m}}\). Using a 75-mm-long composite crystal pumped by two fiber-coupled diode modules, 18 W was obtained at a wavelength of 2121 nm for 53 W of injected power with a slope efficiency of 51 % with respect to absorbed power. The beam propagation factor \((M^{2})\) was measured to be 1.2 at the maximum output power. The laser performance in Q-switched operation was recorded for different repetition rates between 100 Hz and 20 kHz. A maximum output energy of 8.7 mJ was measured at 1 kHz repetition rate.

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Acknowledgments

The research leading to these results has received funding from French la Direction Générale de l’Armement (DGA).

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Authors and Affiliations

  1. French-German Research Institute of Saint-Louis (ISL), 5 rue du Général Cassagnou, Boîte Postale 70034, 68301, Saint-Louis Cedex, France

    A. Berrou, T. Ibach & M. Eichhorn

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  1. A. Berrou
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  2. T. Ibach
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  3. M. Eichhorn
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Correspondence to A. Berrou.

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Berrou, A., Ibach, T. & Eichhorn, M. High-energy resonantly diode-pumped Q-switched \(\hbox {Ho}^{3+}\):YAG laser. Appl. Phys. B 120, 105–110 (2015). https://doi.org/10.1007/s00340-015-6108-y

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  • DOI: https://doi.org/10.1007/s00340-015-6108-y

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