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Anisotropic bubble defects and stress distribution in LuAG single-crystal fibers grown by the laser-heated pedestal growth method.
- Source :
-
CrystEngComm . 5/21/2022, Vol. 24 Issue 19, p3503-3510. 8p. - Publication Year :
- 2022
-
Abstract
- Bubble defects severely affect the optical properties of single-crystal fibers (SCFs), so it is necessary to avoid the incorporation of bubbles during crystal growth. The process of bubbles entering a crystal was observed during pulling of Lu3Al5O12 (LuAG) SCFs from ceramic pedestals by the laser-heated pedestal growth (LHPG) method. The effects of orientation and growth chamber pressure on the density and size of bubbles as well as on stress distribution were fully studied. <111>-oriented LuAG crystal fibers are likely to incorporate more and larger bubbles than <100>-oriented fibers. The low pressure in the growth chamber can limit the formation and transport of bubbles, and the bubble densities are decreased by nearly 50% with a chamber pressure of 0.3 atm. Notably, the <111>-oriented LuAG crystal fibers are more sensitive to pressure with an almost 40% decrease in the average bubble size and stress. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14668033
- Volume :
- 24
- Issue :
- 19
- Database :
- Academic Search Index
- Journal :
- CrystEngComm
- Publication Type :
- Academic Journal
- Accession number :
- 173555664
- Full Text :
- https://doi.org/10.1039/d2ce00040g