Vol. 9, issue 02, article # 21

Kaplun A. B., Meshalkin A. B., Golovei A. D., Safonov V. V., Pasmanik G. A., Potemkin A. K., Mal'shakov A. N. Growing KTiOPO4 crystals and studying their characteristics. // Atmospheric and oceanic optics. 1996. V. 9. No. 02. P. 168-170.    PDF
Copy the reference to clipboard

Abstract:

KTiOPO4 (KTP) monocrystals were grown from the polyphosphate multicomponent fluxes following Czochralski method with the rate of 2.8 to 7 mm per day. Crystals, grown with the pulling rate less than 5.2 mm per day, have radiant resistance up to 3 GW/cm2 for a pulse of 20 ns duration. The conductance was 4•10-11 Ω-1 cm-1 along Z axis and less than 1•10-12 Ω-1 cm-1 along X and Y axes. The absorption coefficient at 1.064 mm was below 1•10-4  cm-1. The coefficient of the second harmonic generation (1.064 mm → 0.532 mm) for the working element with 10x10x7.7 mm3 overall dimensions reached 70% with the incident radiant flux density about 10 MW/cm2. Maximum energy of the radiation converted reached 1 J per pulse at τ = 20 ns and f = 20 Hz. The absorption peaks at 3585 cm-1 (2.8 μm) that are related to OH– groups were not observed in the IR spectrum. The crystals obtained are as good as those grown using the hydrothermal method as concerning their performance characteristics.