Yb:YAG
Yb:YAG crystal is one of the most promising laser-active materials and more suitable for diode-pumping than the traditional Nd-doped systems. It can be pumped at 0.94 μm and generate 1.03 μm laser output. Yb:YAG crystal at 1030nm is a good substitute for a Nd:YAG crystal at 1064nm and its second harmonic at 515nm may replace Ar-ion laser(with a large volume), which emits at 514nm. Yb:YAG crystal is expected to replace Nd:YAG crystal for high power diode-pumped lasers and other potential applications.
Advantages:
1. High optical quality
2. Very high slope efficiency
3. Very low fractional heating, less than11%
4. No excited-state absorption or up-conversion
5. Broad absorption bands, about 8nm@940nm
6. High thermal conductivity and large mechanical strength
7. Conveniently pumped by reliable InGaAs diodes at 940nm(or 970nm)
Format: Rods, Discs and Slabs
Rod sizes: Diameter: 2- 10mm, Length: 30 - 150mm
Disc sizes: Diameter: 2 - 15mm, Thickness: >= 1mm
Slab sizes: Length: 60 - 150mm, Width: 6 - 15mm, Thickness: 3 - 4mm
Ends: Plane, Brewster, Concave and Convex
Sides: Ground, Polished and Grooved
| Dopant concentration | Yb:0.3~15at% |
| Orientation | [100]or[111]within 5° |
| Wavefront Distortion | ≤0.125λ/inch |
| Extinction | ≥28dB |
| Rod Sizes | Diameter: 2~20mm, length: 5~150mm Upon request of customer |
| Dimensional Tolerances | Diameter: +0.00/-0.05mm, length:±0.5mm |
| Barrel Finish | Ground Finish with 400# grit or polished |
| Parallelism | ≤10” |
| Perpendicularity | ≤5’ |
| Flatness | λ/10@632.8nm |
| Surface Quality | 10-5(MIL-O-13830A) |
| Chamfer | 0.15±0.05mm |
| AR Coating Reflectivity | ≤0.25%(@1030nm) |
| Damage Threshold | 500MW/cm210ns 1Hz at 1064nm |
| Chemical Formula | Yb3+:Y3AI5O12 | ||
| Laser Wavelength | 1030nm | ||
| Fluorescence Lifetime | 1.2 ms | ||
| Index of Refraction | 1.82 | ||
| Loss Coefficient | 0.003 cm-1 | ||
| Crystal Structure | Cubic | ||
| Lattice Parameters | 12.01 Å | ||
| Melting Point | 1970℃ | ||
| Moh Hardness | 8.5 | ||
| Density | 4.56±0.04g/cm3 | ||
| Specific Heat (0-20) | 0.59J/g.cm3 | ||
| Thermal Expansion Coefficient | [111]Direction:7.8×10-6/℃(0~250℃) | ||
| Thermal Conductivity | 14W/m/K(@20℃) , 10.5W/m/K(@100℃) | ||
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