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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1994),
  • paper CThI27

Laser and nonlinear optic materials based on LaBGeO5 and new KTiOPO4 type compounds

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Abstract

Stillwellite LaBGeO5 (sp. gr. P31) melts congruently at 1200°C and its single crystals of optical quality are grown by Czochralski technique. The crystallization is complicated by boron oxide evaporation, melt viscosity and supercooling. Recently it was shown LaBGeO5 to be ferroelectric with Tc ≅ 800 K. The phase transition is of complex nature and probably of displacive type. Above phase transition the structure retains acentric.1 The results of phase transition investigation by different methods are discussed.

© 1994 Optical Society of America

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