Er: YAG レーザー結晶
仕様
Parameter
| Orientation | [100] or [100] <± 0.5。 |
| Parallelism | 10〞 |
| Perpendicularity | 5ˊ |
| Surface Quality | 10-5 |
| Wavefront Distortion | <λ/8@632 nm |
| Surface Flatness | <λ/10@632.8nm |
| Clear Aperture | >90% |
| Chamfer | 0.1mm@45° |
| Thickness/Diameter Tolerance | ±0.05 mm |
| Maximum Dimensions | Diameter:2mm-50mm, Length:5mm-180mm |
| Coatings | < 0.25% @ 2940 nm |
| Crystal Structure | cubic – la3d |
| Lattice Constants | 12.01Å |
| Density | 4.56-5.11 g/cm3 |
| Melting Point | 1950°C |
| Thermal Conductivity/(W·m-1·K-1@25°C) | 0.14W |
| Specific Heat/(J·g-1·K-1) | 0.59 |
| Thermal Shock Resistance | 790W/m |
| Thermal Expansion /(10-6·K-1@25°C ) | 7.8 |
| Hardness (Mohs) | 8.5 |
| Young`s Modulus /GPa | 317 |
| Shear Modulus /Gpa | 54.66 |
| Extinction Ratio/dB | 30 |
| Barrel Finish | Ground Finish 400#Grit |
| Poisson Ratio | 0.25 |
| Laser Transition | 4I11/2 → 4I13/2 (highly doped); 4I13/2 → 4I15/2 (low doped) |
| Laser Wavelength | 2940 nm (highly doped); 1645 nm (low doped) |
| Photon Energy | 6.75×10-20J@2940nm |
| Pump Absorption Band Width | 600~800 nm (highly doped); 1530 nm (low doped) |
| Damage Threshold | >500MW/cm2 |
| Emission Cross Section | 3×10-20 cm2 |
| Fluorescence Lifetime | 0.23 ms (highly doped); 2~5 ms (low doped) |
| Refractive Index | 1.7838@2940 nm |
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