Er:YAG Crystal
Er:YAG is an excellent laser crystal which lasers at 2.94μm.It has wide applications in medical laser systems, and others.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Dopant concentration [Er] | ~50 at% |
| Orientation | [111] within5° |
| Wavefront Distortion [@1064nm] | ≤0.125λ/inch |
| Extinction Ratio | ≥25 dB |
| Rod Sizes [Upon request of customer] | Diameter:3~6mm; Length:50~120mm |
| Dimensional Tolerances | Diameter:+0.00/-0.05mm; Length:±0.5mm |
| Barrel Finish | Ground Finish with400# Grit or polished |
| Parallelism | ≤10″ |
| Perpendicularity | ≤5′ |
| Flatness [@632.8nm] | λ/10 |
| Surface Quality | 10-5 (MIL-O-13830B) |
| Chamfer | 0.15±0.05 mm |
| AR Coating Reflectivity [@2940nm] | ≤0.25 % |
| Crystal Structure | Cubic |
| Lattice Parameters | 12.01 Å |
| Melting Point | 1970 °C |
| Moh Hardness | 8.5 |
| Density | 4.56±0.04 g/cm³ |
| Specific Heat [0~20; original compound unit retained as supplied] | 0.59J/g.cm³ |
| Modulus of Elasticity | 310 GPa |
| Young's Modulus | 3.17×10⁴ |
| Poisson Ratio [est.] | 0.3 |
| Tensile Strength | 0.13~0.26 GPa |
| Thermal Expansion Coefficient [[100]Direction；0~250℃] | 8.2×10⁻⁶ |
| Thermal Expansion Coefficient [[110]Direction；0~250℃] | 7.7×10⁻⁶ |
| Thermal Expansion Coefficient [[111]Direction；0~250℃] | 7.8×10⁻⁶ |
| Thermal Conductivity [@20℃] | 14 W/m/K |
| Thermal Conductivity [@100℃] | 10.5 W/m/K |
| Thermal Optical Coefficient [dn/dT] | 7.3×10⁻⁶ |
| Thermal Shock Resistance | 790 W/m |
| Solubility [Source wording] | Water:Insoluble; Common Acid:Slightly |
| Laser Transition | ⁴I₁₁/₂→⁴I₁₃/₂ |
| Laser Wavelength | 2940 nm |
| Photon Energy [@2940nm] | 6.75×10⁻²⁰ |
| Emission Cross Section | 3×10⁻²⁰ |
| Index of Refraction [@2940nm] | 1.79 |
| Pump Bands | 600~800 nm |
Applications
Key Features
Datasheet
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Supplier Information
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