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Czechoslovak Journal of Physics

, Volume 40, Issue 1, pp 99–108 | Cite as

Absorption background and laser properties of YAP:Nd

  • Jiří Kvapil
  • Bohumil Perner
  • Michal Košelja
  • Josef Kvapil
Article

Abstract

YAP:Nd laser crystals suffer to a greater extent than YAG:Nd from colour centres formation. Stable brownish-yellow or green colourations are evoked by non-oxidizing treatment at high (>1500 °C) temperature. The former colouration may be attributed to holes in the oxygen neighbourhood of Y3+ at Al sites, the latter to the F+ centres. Brownish-red colouration of less stability is induced by optical pumping of Nd3+ containing crystals. It may be attributed to holes in oxygen neighbourhood of Nd3+.

Dependences of the colourations on the preparation methods are described. YAP:Nd,Zr laser rods, oxygen annealing of which was followed by medium (1100–1400 °C) temperature treatment in vacuum or hydrogen showed no anomalous colouration and extremely low losses at Nd3+ emission wavelength independent of pumping power. Using such rods, an overall efficiency of 2·5% and a slope efficiency of 3·0% in CW lasers were reached.

Keywords

Hydrogen Colour Temperature Treatment Emission Wavelength Preparation Method 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Academia, Publishing House of the Czechoslovak Academy of Sciences 1990

Authors and Affiliations

  • Jiří Kvapil
    • 1
  • Bohumil Perner
    • 1
  • Michal Košelja
    • 1
  • Josef Kvapil
    • 1
  1. 1.Monokrystaly TurnovTurnovCzechoslovakia

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