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Temperature distribution and thermal-induced defects in photorefractive barium titanate crystals illuminated with intense cw or pulsed laser irradiations

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Abstract.

The temperature distribution in a parallelepipedic crystal irradiated with a Gaussian repartition of light is calculated by solving the three-dimensional heat equation and taking into account the losses through the sides of the samples. The theoretical and experimental maps of temperature are satisfactorily compared. For barium titanate crystals, the resistance to intense cw laser (25.7 kW/mm2 at 514.5 nm) and to Nd:YAG pulsed laser (peak power of 9.2 MW at 532 nm) is investigated. The defects induced by the irradiation are analysed. Under pulsed illumination, the damage threshold is found to be 0.54 GW/cm2 in a nominally undoped BaTiO3 and 0.44 GW/cm2 in a rhodium-cobalt doped BaTiO3 crystal.

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Authors and Affiliations

  1. Laboratoire de Physique de l’Université de Bourgogne, Matériaux Photoréfractifs et Applications, Centre National de la Recherche Scientifique, Unité Mixte de Recherche 5027, 9 Avenue Alain Savary, B.P. 47870, 21078 Dijon Cedex, France, , , , , , FR

    P. Mathey, S. Latour, P. Lompré & P. Jullien

  2. Forschunginstitut für mineralische und metallische Werkstoffe, Edelsteine/Edelmetalle GmbH, Struthstrasse 2, Wackenmühle, 55743 Idar-Oberstein, Germany, , , , , , DE

    D. Rytz

  3. Centre d’Etudes Nucléaires de Grenoble, Laboratoire de Cryophysique, 38054 Grenoble Cedex 9, France, , , , , , FR

    B. Salce

Authors
  1. P. Mathey
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  2. S. Latour
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  3. P. Lompré
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  4. P. Jullien
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  5. D. Rytz
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  6. B. Salce
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Additional information

Received: 7 March 2000 / Revised version: 14 April 2000 / Published online: 16 August 2000

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Mathey, P., Latour, S., Lompré, P. et al. Temperature distribution and thermal-induced defects in photorefractive barium titanate crystals illuminated with intense cw or pulsed laser irradiations. Appl Phys B 71, 523–531 (2000). https://doi.org/10.1007/s003400000361

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  • DOI: https://doi.org/10.1007/s003400000361

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