Undoped YAG is a new substrate and window material that can be used for both UV and IR optics. Undoped YAG we produce has non-scattering, non-dislocation , stable mechanical and chemical properties ,high thermal conductivity ,non-birefringence.
Specifications:
| Orientation | <111> within 5º |
| Flatness | < λ/10 |
| Parallism | ≤30" |
| Perpendicularity | ≤5 ' |
| Surface Quality | 10/5 (MIL-O-13830A) |
| Optical Quality | Interference fringes ≤ 0. 25 λ /inch |
| Size | Rods: Ø (3~10)mm×(30~180)mm (L) Slabs: (3~12)mm×(6~24)mm×(60~180)mm (L) Upon request of customer |
| Dimensional tolerances | Diameter: +0/-0.05mm Length: ±0.5mm , Chamfer : <0.1 mm @ 45º |
| AR-Coating Reflectivity | ≤ 0.2% (@1064nm) |
Main properties of YAG crystal:
| Chemical Formula | Y3Al5O12 |
| Crystal Structure | Cubic |
| Lattice Parameters | 12.01 Å |
| Melting Point: | 1950 °C |
| Density, g/cm3 | 4.56 |
| Mohs Hardness | 8.5 |
| Modulus of Elasticity | 310GPa |
| Tensile Strength | 0.13~0.26GPa |
| Thermal Expansion Coefficient | 7.8 x 10-6/ ℃ <111> |
| Thermal Conductivity | 14W/m/K |
| Thermal Optical Coefficient (dn/dT) | 7.3 × 10-6/ ℃ |
| Thermal Shock Resistance | 790W/m |
| Index of Refraction at 0.8 μm at 0.9 μm at 1.0 μm at 1.2 μm at 1.4 μm | 1.8245 1.8222 1.8197 1.8152 1.8121 |
| Damage Threshold | ≥ 15Jcm-2 |
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