22 May 2019 Description
Yb: YAG is a laser crystal which is doped with trivalent ytterbium ions in yttrium aluminum garnet crystal and can emits 1030 nm near-infrared laser. Yb: YAG crystal has characters of high quantum efficiency, no excited state absorption and up-conversion, high concentration tolerance, long fluorescence lifetime, wide absorption band and broad emission range and robust optical, mechanical and thermal properties etc., which makes it have great potential application in high efficiency, high power diode-pumped solid-state lasers.
Parameter
Material and Specifications
| Materials |
Yb:YAG |
| Yb Concentration Tolerance (atm%) |
0.5, 1, 2, 3, 5, 7.5 , 10, 15, 20, 25% |
| Orientation |
[001] or [110] or [111] <±0.5° |
| Parallelism |
10〞 |
| Perpendicularity |
5ˊ |
| Surface Quality |
10-5(MIL-O-13830A) |
| Wavefront Distortion |
λ/4@632nm |
| Surface Flatness |
λ/8@632nm |
| Clear Aperture |
>95% |
| Chamfer |
<0.1×45° |
| Thickness/Diameter Tolerance |
±0.05 mm |
| Maximum Dimensions |
dia 50×100 mm |
| Coatings |
AR/AR@940+1030；HR@940+AR1030 |
Physical and Chemical Properties
| Crystal Structure |
cubic – la3d |
| Lattice Constants |
12.01 Å |
| Density |
4.56±0.04 g/cm3 |
| Melting Point |
1970 °C |
| Thermal Conductivity /(W·m-1·K-1@25°C) |
λ/4@632nm |
| Specific Heat/ (J·g-1·K-1) |
0.59 |
| Thermal Optical Coefficient(dn/dT) |
7.3×10-6/℃ |
| Thermal Expansion /（10-6·K-1@25°C ） |
8.2 [100] 7.7 [110] 7.8 [111] |
| Hardness (Mohs) |
8.5 |
| Young`s Modulus /GPa |
317 |
| Shear Modulus /Gpa |
54.66 |
| Extinction Ratio |
25 dB |
| Tensile Strength/Gpa |
0.13-0.26 |
| Solubility |
Water: Insoluble; Common Acides: Slightly |
| Poisson Ratio |
0.25 |
Optical and Spectral Properties
| Laser Transition |
2F5/2→2F7/2 |
| Laser Wavelength |
1030 nm |
| Photon Energy |
1.93×10-19J(@1030 nm) |
| Pump Absorption Band Width |
8 nm |
| Loss Coefficient |
0.003 cm-1 |
| Diode Pump Band |
940 nm or 970 nm |
| Emission Cross Section |
2.0×10-20 cm2 |
| Fluorescence Lifetime |
1.2 ms |
| Emission Linewidth |
9 nm |
| Refractive Index @1.030 μm |
1.82 |
| Thermal Optical Coefficient |
9× 10-6/℃ |
Absorption and Emission Spectrum
 
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