| Yb-dopant Concentration | 0.2%---30% at% (Tolerance 10% of concentration) | Diameter | 20 mm (+0.0/ -0.025mm) |
| Length | 1~70mm, (+/-0.05mm) | Coating Specification |
AR @ 940nm or HR @940nm AR @ 1053nm or AR @1030nm or HR @1053nm |
| Parallelism | < 10 arc seconds | Perpendicularity | < 5 arc minutes |
| Chamfer | 0.15x45° | Barrel Finish | ground or polished |
| Wavefront Distortion | <λ/10 per inch at 632.8nm for <7mm | Surface Flatness | <λ/10 at 632.8nm |
| Surface Quality | better than 20/10 | Clear Aperture | Central 95% |
Physical and Optical Properties:
| Chemical Formula | Yb:Y3Al5O12 | Crystal Structure | Cubic |
| Lattice Constants | 12.01 Å | Melting Point | 1970℃ |
| Density | 4.56 g/cm3 | Mohs Hardness | 8.5 |
| Thermal Expansion Coefficient | 7.8x10-6/K, [111], 0-250℃ | Thermal Conductivity | 14W/m/K(@20°C) |
| Loss Coefficient | 0.003 cm-1 | Index of Refraction | 1.82 |
| Laser Wavelength | 1030nm | Pump Wavelength | 940nm |
| Absorption band about pump wavelength | 10nm | ||
Ytterbium-doped yttrium aluminum garnet or Yb:YAG is a laser media used in DPSS laser of superior overall performance. It is more suitable for diode-pumping than the traditional Nd-doped materials. It can be pumped at 0.94μm. Compared with the common Nd:YAG crystal, Yb:YAG crystal has a much larger absorption bandwidth to reduce thermal management requirements for diode lasers, a longer upper-state lifetime, and three to four times lower thermal loading per unit pump power. Yb:YAG crystal is expected to replace Nd:YAG crystal for high-power diode-pumped lasers and other potential applications.
Laser Crystal Comparison Chart:
