Minimization of the surface non-uniformity of a Nd:YVO4 cylindrical bar grown by edge-defined film-fed growth (EFG) system in low-gravity environment

Liliana Braescu; Agneta M. Balint; Robert Szabo; Stefan Balint

doi:10.1117/12.613894

20 September 2005 Minimization of the surface non-uniformity of a Nd:YVO₄ cylindrical bar grown by edge-defined film-fed growth (EFG) system in low-gravity environment

Liliana Braescu, Agneta M. Balint, Robert Szabo, Stefan Balint

Author Affiliations +

Proceedings Volume 5912, Operational Characteristics and Crystal Growth of Nonlinear Optical Materials II; 59120M (2005) https://doi.org/10.1117/12.613894
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

In this paper the dependence of the radius of a Nd:YVO₄ cylindrical bar, grown in a low-gravity environment, on the pulling rate (v), melt temperature (T₀) at the meniscus basis, pressure in the furnace (p) and die radius (r_0e) is found. Those values of v, T0, p and r_0e are determined for which the crystal radius variation, due to small uncontrollable variations of v, T₀, p around some average values, cause minimal surface non-uniformity. Numerical results are given for a Nd:YVO₄ cylindrical bar grown in a furnace in which the vertical temperature gradient is k=33 K/mm. Finally, the results obtained in low-gravity environment are compared to those obtained in terrestrial conditions.

Citation Download Citation

Liliana Braescu, Agneta M. Balint, Robert Szabo, and Stefan Balint "Minimization of the surface non-uniformity of a Nd:YVO₄ cylindrical bar grown by edge-defined film-fed growth (EFG) system in low-gravity environment", Proc. SPIE 5912, Operational Characteristics and Crystal Growth of Nonlinear Optical Materials II, 59120M (20 September 2005); https://doi.org/10.1117/12.613894

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