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Er:YAG
- Er:YAG is an excellent laser crystal which lases at 2940 nm. This wavelength is the most readily absorbed into water and hydroxylapatite of all existing wavelengths and is considered a highly surface cutting laser. It has wide applications in medical applications, such as dental (hard tissues), orthopedics, etc.
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Advantages of Er:YAG Crystal:
• High slope efficiency;
• Operate well at room temperature;
• Operate in a relatively eye-safe wavelength range.
Material and Specifications
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Dopant concentration |
Er: ~50 at% |
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Wavefront Distortion |
≤0.125λ/inch(@1064nm) |
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Extinction Ratio |
≥25 dB |
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Rod Sizes |
Diameter:3~6mm, Length:50~120 mm Upon request of customer |
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Dimensional Tolerances |
Diameter:+0.000"/-0.002", |
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Barrel Finish |
Ground Finish: 400# Grit |
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Parallelism |
≤10" |
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Perpendicularity |
≤5′ |
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Flatness |
λ/10 |
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Surface Quality |
10/5 (MIL-PRF-13830B) |
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Chamfer |
0.006"±0.002" at 45°± 5° |
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AR Coating Reflectivity |
≤ 0.25% (@2940nm) |
Optical and Spectral Properties of Er:YAG Crystal
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Laser Transition |
4 I 11/2 to 4 I 13/2 |
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Laser Wavelength |
2940nm |
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Photon Energy |
6.75×10-20 J(@2940nm) |
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Emission Cross Section |
3×10-20 cm2 |
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Index of Refraction |
1.79 @2940nm |
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Pump Bands |
600~800 nm |
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Laser Crystals_Er_YAG.pdf
