Tm Concentration Tolerance (atm%) |
Tm:0.5~5at% |
Orientation |
[111]<5 |
Parallelism |
≤10 |
Perpendicularity |
≤5′ |
Surface Quality |
10-5 (MIL-O-13830A) |
Wavefront Distortion |
≤ 0.125/25 mm @632.8nm |
Surface Flatness |
/8@632nm |
Clear Aperture |
>95% |
Chamfer |
0.15±0.05mm |
Size |
D: 2~10mmL: 3~150mm |
Coatings |
AR0.25% @2m |
Crystal Structure |
Cubic |
Lattice Constants |
12.01 |
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 |
Thermal Optical 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 Ratio |
0.25 |
Thermal Shock Resistance |
790W/m |
Laser Transition |
3F43H6 |
Laser Wavelength |
1.87~2.16m |
Temperature Dependence of Refractive Index |
7.3 10-6/K |
Absorption Cross Section |
7.5×10-21cm2 |
Diode Pump Band |
785nm, 680nm |
Emission Cross Section@2013nm |
2.9×10-20 cm2 |
Fluorescence Lifetime |
11ms |
Refractive Index @632nm |
1.83 |