Co:LMA
Chemical formula:Co2+:MgAl2O4. Orientation:<111>. Surfaces:plane/plane. Flatness:<ʎ/10 @ 632.8 nm. Parallelism:<10 arcsec. Perpendicularity:<10 arcmin. Chamfer:< 0.1 mm x 45 °. Surface quality:10-5 S-D. Chemical composition: the host is magnesium aluminate spinel (MgAl₂O₄), a cubic oxide crystal with high hardness, high thermal conductivity, and excellent optical homogeneity. Active ion:Co²⁺ (divalent cobalt), doped into the spinel lattice as a luminescence center. Crystal structure:cubic spinel, with high chemical stability, high-temperature resistance, and excellent radiation resistance. Emission band:mid-infrared1.4–1.7 μm (main tuning range), covering atmospheric transmission windows and common medical-laser wavelengths. The broad tuning range suits tunable lasers. Absorption: a peak near~1.2 μm supports Nd:YAG (1.06 μm) or thulium-doped fiber lasers (1.9 μm) as pump sources. Thermal conductivity: the MgAl₂O₄ host reaches~20 W/(m·K), providing excellent heat dissipation for high-power laser systems.
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