Tm：YAG
Features: high quantum efficiency, high LD-pump efficiency, long excited-state lifetime, sufficient gain bandwidth, small quantum defect, and high damage threshold. Applications: medical lasers, lidar, atmospheric sensing, military engineering, electro-optical countermeasures, and remote sensing. Crystal structure | Cubic Lattice constant | 12.01 Å Density | 4.56±0.04g/cm3 Melting point | 1970℃ Thermal conductivity/W/m/K @20℃ | 14W/m/K@20℃; 10.5W/m/K@100℃ Specific heat (J/g.cm3@0-20℃) | 0.59 Thermo-optic coefficient (dn/dT) | 7.3×10-6/K Thermal expansion | [100]: 8.2×10-6/K@0~250℃ [110]: 7.7×10-6/K@0~250℃ [111]: 7.8×10-6/K@0~250℃ Hardness (Mohs) | 8.5 Young's modulus | 3.17×104Kg/mm2 Shear modulus | 310GPa Extinction ratio | ≥25dB @632.8nm Tensile strength/Gpa | 0.13~0.26 Solubility | Insoluble in water, slightly soluble in ordinary acids Poisson's ratio | 0.25 Thermal-shock resistance | 790W/m Tm concentration tolerance (atm%) | Tm:0.5~5at% Orientation | [111], <5º Parallelism | ≤10″ Perpendicularity | ≤5′ Surface quality | 10-5 (MIL-O-13830A) Wavefront distortion | ≤0.125λ/25 mm @632.8nm Flatness | λ/8@632nm Clear aperture | >95% Bevel | 0.15±0.05mm Dimensions | D:2~10mm, L:3~150mm Coating | AR:≤0.25% @2μm
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