Translator Disclaimer
26 May 1999 Problems of beta-BeB2O4 crystal growth for fabrication of large optical elements
Author Affiliations +
Abstract
Boundaries of the electric macrotwins (antipolar parts of crystal) have always been found in X- or Y-axis crystals. Boundaries are nearly planar and located in subseed zone of crystal along the (00.1) plane. In large crystals two more of such boundaries are usually found at a distance of 15 - 18 mm in both sides from the central boundary. In Z-axis crystals, boundaries of macrotwins have never been found. There are only microtwins up to a few mm in size and insuperable tendency to cellular breakdown across the entire growth interface of crystals after 15 - 30 mm of growth. When Na2O and NaF are used as a solvent, antipolar microtwins can be found near macrotwin boundaries or cellular growth zone and in the whole volume of crystals, respectively. In the latter case, crystals are stressed and show a partial fracture along the (00.1) plane. Misoriented blocks and low-angular boundaries can be found at the growth stages later than seeding and growing up to the required sections. Most of the inclusions in BBO crystals are of flux type with a partially void space and a soli state core. If reactions of synthesis had not been finished before melting, enormous amounts of CO2 and probably some amounts of OH were detected, along with near eutectical alignment of Ba and Na in the core of inclusions. Possible causes of formation of the above-mentioned features in BBO structure are discussed.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Eugene G. Tsvetkov, Victor I. Tyurikov, Valery D. Antsygin, and Alexander M. Yurkin "Problems of beta-BeB2O4 crystal growth for fabrication of large optical elements", Proc. SPIE 3610, Laser Material Crystal Growth and Nonlinear Materials and Devices, (26 May 1999); https://doi.org/10.1117/12.349232
PROCEEDINGS
5 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

Conoscopic methods of optic crystal research
Proceedings of SPIE (March 04 2007)
Second-harmonic generation with elliptical Bessel beams
Proceedings of SPIE (July 23 2002)
Theory of a self-induced transparency in crystals
Proceedings of SPIE (November 18 2003)
Nonlinear Optical Properties Of A New Organic Crystal 4...
Proceedings of SPIE (January 14 1990)
Magneto-optical bistability of Frenkel excitons
Proceedings of SPIE (June 03 2004)

Back to Top