Abstract
Active components in solid-state lasers require materials that are resistant to fracture from thermal loading. Design data suggest that component failure from thermal stresses may be a primary limitation on power output in high-average-power applications. The strength of brittle crystalline and glass laser materials in the presence of thermally induced surface tensile stresses depends both on the material’s inherent resistance to crack extension under load (the fracture toughness) as well as the size of the flaws that inevitably exist at the surfaces.
© 1985 Optical Society of America
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