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13 May 1997 Annealing of KDP crystals in vacuum and under pressure
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Abstract
The effect of the high temperature annealing on the absorption spectra and laser damage threshold of KDP crystals was studied in the present paper. The experiments on isothermal annealing were performed under pressure in the atmosphere with specific properties. The composition of the atmosphere was selected to be chose to that of the desorbing gas component determined during annealing in vacuum. The mentioned conditions allowed to conduct annealing in the temperature range of 230-280 degrees C without a degradation of the sample. The variations in the absorption spectra showed that the effect of the annealing is most strongly revealed in the short-wave region of the spectrum. The real decrease of the absorption coefficient in the samples after annealing demonstrate that at temperatures approximately 230-280 degrees C. The processes ensuring the improvement of the structure quality are stimulated in the volume of the crystals. These conclusions are also confirmed by the data on laser damage threshold of KDP crystals.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Igor M. Pritula, Marina I. Kolybayeva, Vitaly I. Salo, A. V. Semenov, and Serge V. Garnov "Annealing of KDP crystals in vacuum and under pressure", Proc. SPIE 2966, Laser-Induced Damage in Optical Materials: 1996, (13 May 1997); https://doi.org/10.1117/12.274260
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