Laser operation and computation of thermal stress in endpumped 1.1 at.% Nd-doped yttrium aluminium garnet rods with sub-millimetre diameters

Laser operation of a fibre-like 1.1 at.% Nd-doped yttrium aluminium garnet rod with a diameter of 0.34 mm and a length of 4.7 mm has been demonstrated. The fibre was end pumped with 0.5 W of continuous-wave radiation from a laser diode emitting at 808 nm. The measured laser thresholds are in a reaso...

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Bibliographic Details
Published in:Journal of modern optics 2002-11, Vol.49 (13), p.2059-2064
Main Authors: Vatnik, Sergei, El-Agmy, Reda, Graf, Thomas
Format: Article
Language:English
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Summary:Laser operation of a fibre-like 1.1 at.% Nd-doped yttrium aluminium garnet rod with a diameter of 0.34 mm and a length of 4.7 mm has been demonstrated. The fibre was end pumped with 0.5 W of continuous-wave radiation from a laser diode emitting at 808 nm. The measured laser thresholds are in a reasonable agreement with theoretical estimations. The distributions of temperature and stress in the crystal fibre were calculated with finite-element simulations showing that the fibre can be pumped up to a power of 40-50 W without fracture caused by thermal stress. The advantages and disadvantages of the proposed laser rod design are discussed.
ISSN:0950-0340
1362-3044
DOI:10.1080/09500340210130129