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Tunable laser radiation, nonlinear absorption, and “anti-stokes” luminescence of color centers in α-Al2O3

Abstract

This work investigates the generation of laser radiation by color centers of leucosapphire, nonlinear absorption, and the excitation mechanism of UV-luminescence. It is shown that UV-luminescence from color centers, excited in the 0.68 μm absorption band, is caused by a two-staged excitation mechanism. The optical characteristics of the color centers are measured and calculation is made of the variation of the absorption coefficient with laser pulse's duration.

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Literature cited

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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 10, pp. 41–46, October, 1987.

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Tokarev, A.G., Martynovich, E.F. & Zilov, S.A. Tunable laser radiation, nonlinear absorption, and “anti-stokes” luminescence of color centers in α-Al2O3 . Soviet Physics Journal 30, 842–846 (1987). https://doi.org/10.1007/BF00897250

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Keywords

  • Color
  • Radiation
  • Absorption Coefficient
  • Absorption Band
  • Laser Pulse