Fe2+ doped transparent lithium aluminosilicate glass-ceramics with broadband absorption in the spectral range of 2 μm

Transparent thermal-shock resistant glass-ceramics of the lithium aluminosilicate system nucleated by titania and doped with ferrous ions have been developed. There structure, thermal-mechanical and optical properties were studied. Their broadband absorption in the spectral region of $1.5-2.5 \mu \mathrm{m}$ is due to $\mathrm{Fe}^{2+}$ ions in tetrahedral positions in $\gamma^{-} \mathrm{Al}_{2} \mathrm{O}_{3}$ nanocrystals with cubic spinel structure.