Sapphire substrates, <0001>, L × W × thickness 10 mm × 10 mm × 0.5 mm

Sapphire is a gemstone, a variety of the mineral corundum, an aluminium oxide (α-Al2O3).

SSC 060 (OTTO) Sapphire substrates, <0001>, L × W × thickness 10 mm × 10 mm × 0.5 mm - used for end windows on some high-powered laser tubes as its wide-band transparency and thermal conductivity allow it to handle very high power densities in the infra-red or UV spectrum without degrading due to heating.