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Temperature dependence of efficiency and thermal lensing of diode-laser-pumped Nd:YAG lasers

  • Advanced Optically Pumped Solid-State Lasers
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Abstract

Efficiencies, lasing thresholds and thermal lensing of a Nd:YAG rod side-pumped with two 10 W diode-laser-arrays are measured for various rod temperatures between 80 K and 380 K. The threshold is reduced by a factor of 2.5–4 on cooling from room temperature to about 100 K, while the slope efficiency is increased by between 0% and 50% depending on the reflectivity of the outcoupling mirror. Extrapolation to a 240 W pumped laser gives an increase in optical efficiency of 25% to 30%. The thermal lensing measured with a beam deflection and an interferometric method is reduced by a factor of 10.

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Authors and Affiliations

  1. Deutsche Forschungsanstalt für Luft- und Raumfahrt e. V., Institut für Technische Physik, Pfaffenwaldring 38-40, D-70569, Stuttgart, Germany

    U. Brauch

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  1. U. Brauch
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Brauch, U. Temperature dependence of efficiency and thermal lensing of diode-laser-pumped Nd:YAG lasers. Appl. Phys. B 58, 397–402 (1994). https://doi.org/10.1007/BF01081880

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  • DOI: https://doi.org/10.1007/BF01081880

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