Growth of Composite Sapphire/Ti:Sapphire by The Hydrothermal Method
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- Category: Molybdenum & Sapphire Growth Furnace News
- Published on 23 December 2013
- Written by Cloudy
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Composite sapphire/Ti:sapphire crystals for high-power laser application were grown by the hydrothermal 
method. The results of the X-ray rocking curve analysis indicate high crystalline quality of the surface Al2O3 material. The strong bonding between the overgrown Al2O3 and seed Ti:Al2O3 crystals is indispensable for withstanding high thermal stresses produced by intense optical pumping. The optical loss at the boundary of the composite crystal is considerably low, indicating the lack of scattering centers.
The characteristics of the melt flow in the meniscus in edge-defined film-fed growth have been studied using a 3-D model. The influence of the growth conditions (pulling rates and ambient temperature distribution) on the void distribution in rod sapphire crystals has been studied modeling the melt flow in the meniscus. The flow behavior obtained can explain the observed void distribution.
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