Er:YAG Laser Crystals
When tissue ablation and precise surface cutting demand absolute control, the 2.94 µm wavelength is unparalleled. ATR Crystal engineers premium Erbium-doped Yttrium Aluminum Garnet (Er:YAG) specifically to deliver this critical emission. By fusing highly controlled Erbium doping with the rugged thermomechanical stability of the YAG lattice, we provide the ultimate solid-state core for advanced medical and precise surface-processing laser systems.Targeted 2.94 µm Emission: Perfectly tuned for peak water absorption, guaranteeing highly efficient, shallow-penetration surface ablation.
Exceptional Thermal Stability: Leverages the superior optical and thermal properties of the robust YAG host to sustain stable, high-power outputs.
Medical & Clinical Dominance: The globally recognized, industry-standard gain medium for demanding dermatology, dentistry, and specialized surgical lasers.
Product Category:
Laser Crystals
Advantages
1 ) Very high slope efficiency
2 ) Operates well at room temperature
3 ) Operate in a relatively eye-safe wavelength range
| Specifications of Er YAG Crystals | |
| Dopant concentration | 20at% and 50 at% |
| Orientation | [100] within 5° |
| Wavefront Distortion | ≤0.125 λ/inch(@1064nm) |
| Optical Quality | Interference fringes ≤ 0. 125 /inch |
| Extinction ration Ø3~Ø6.35 ≥ 28db, Ø7~Ø10 ≥ 25dB | |
| 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: +0.00/-0.05mm |
| Length: ±0.5mm, chamfer :<0.15±0.05mm@45° | |
| Parallelism | ≤10″ |
| Perpendicularity | ≤5′ |
| Flatness | λ/10 @632.8nm |
| Surface Quality | 10-5(MIL-O-13830A) |
| AR Coating Reflectivity | ≤ 0.25% (@2940nm) |
| Damage threshold | ≥ 500MW/cm2 10ns 1Hz at 1064nm |
| Properties of Er YAG Crystals | |
| 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 | [100]Direction:8.2×10-6/℃(0~250℃) |
| Thermal Conductivity | 14W/m/K(@20℃) |
| 10.5W/m/K(@100℃) | |
| Laser Transition | 4I11/2 to 4I13/2 |
| Laser Wavelength | 2940nm |
| Emission Cross Section | 3×10-20 cm2 |
| Index of Refraction | 1.79 @2940nm |
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