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Item: YAG-003
Item: YAG-003
Product Name: Er:YAG
Er:YAG is an excellent laser crystal which lasers at 2.94μm.It has wide applications in medical laser systems, and others.
Advantages of Er:YAG Crystals
High slope efficiency
Operate well at room temperature
Operate in a relatively eye-safe wavelength range
Material and Specifications
| Dopant concentration | Er: ~50 at% |
| Orientation | [111] within 5° |
| Wavefront Distortion | ≤0.125λ/inch(@1064nm) |
| Extinction Ratio | ≥25 dB |
| Rod Sizes | Diameter:3~6mm, Length:50~120 mm Upon request of customer |
| Dimensional Tolerances | Diameter:+0.000"/-0.002", Length: ± 0.02" |
| Barrel Finish | Ground Finish: 400# Grit |
| Parallelism | ≤10" |
| Perpendicularity | ≤5' |
| Flatness | λ/10 |
| Surface Quality | 10-5(MIL-O-13830A) |
| Chamfer | 0.006"±0.002" |
| AR Coating Reflectivity | ≤ 0.25% (@2940nm) |
Optical and Spectral Properties of Er:YAG Crystals
| Laser Transition | 4I11/2 to 4I13/2 |
| Laser Wavelength | 2940nm |
| Photon Energy | 6.75×10-20 J(@2940nm) |
| Emission Cross Section | 3×10-20 cm2 |
| Index of Refraction | 1.79 @2940nm |
| Pump Bands | 600~800 nm |
Physical and Chemical Properties
| Crystal Structure | Cubic |
| Lattice Parameters | 12.01 Å |
| Melting Point | 1970¡æ |
| Moh Hardness | 8.5 |
| Density | 4.56±0.04g/cm3 |
| Specific Heat (0-20) | 0.59J/g.cm3 |
| Modulus of Elasticity | 310GPa |
| Young's Modulus | 3.17×104Kg/mm2 |
| Poisson Ratio | 0.3(est.) |
| Tensile Strength | 0.13~0.26GPa |
| Thermal Expansion Coefficient | [100]Direction:8.2×10-6/oC(0~250oC) |
| [110]Direction:7.7×10-6/oC(0~250oC) | |
| [111]Direction:7.8×10-6/oC(0~250oC) | |
| Thermal Conductivity | 4W/m/K(@20oC) |
| 10.5W/m/K(@100oC) | |
| Thermal Optical Coefficient (dn/dT) | 7.3×10-6/oC |
| Thermal Shock Resistance | 790W/m |
| Solubility | Water: Insoluble;Common Acids: Slightly |