Laser welding of fused silica glass with sapphire using a non-stoichiometric, fresnoitic Ba^sub 2^TiSi^sub 2^O^sub 8^·3 SiO^sub 2^ thin film as an absorber

Laser welding of dissimilar materials is challenging, due to their difference in coefficients of thermal expansion (CTE). In this work, fused silica-to-sapphire joints were achieved by employment of a ns laser focused in the intermediate Si-enriched fresnoitic glass thin film sealant. The microstruc...

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