Abstract
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 Al 2O 3 material. The strong bonding between the overgrown Al 2O 3 and seed Ti:Al 2O 3 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.
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