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, Liliana Braescu, Agneta M. Balint, Agneta M. Balint, Robert Szabo, Robert Szabo, Stefan Balint, 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); doi: 10.1117/12.613894; https://doi.org/10.1117/12.613894

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