Neodymium doped Yttrium Aluminium Garnet (Nd:Y3Al5O12 or Nd:YAG) crystal with the excellent thermal-mechanical properties and unique laser properties is by far the most commonly used solid-state laser material. Pumped by Xenon arc lamp or 808nm-LD, Nd:YAG mainly lase at 1064.14nm and run in both pulsed and CW operation. Nd:YAG laser has been widely used in a various applications in the military, scientific, industrial, and medical areas.
LaserMa provide high quality Nd:YAG laser crystal in the form of disk, rod or slab with different dimensions and specifications described as below.
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Main Specifications of Nd:YAG rod or slab |
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Nd Dopant concentration |
2-3at%(high level for disk or slab), 0.8-1.1at% |
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Orientation |
<111> within ± 0.5o |
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Dimensions |
Ф60×2mm3,
Ф2-15mm± 0.05mm; Length 5-200mm ± 0.5mm
Ф50mm or 30x30mm2, thickness of 1-5mm for slab |
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Dimension tolerance |
Dia. +0.000’’/-0.002’’, length ± 0.02’’ |
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Barrel finish |
Ground finish 400# grit |
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Chamfer |
0.006’’ ± 0.002’’ @45o± 5o |
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Parallelism |
≤ 10” |
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perpendicularity |
≤ 5’ |
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End faces flatness |
λ/10 |
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End faces quality |
10/5 (MIL-O-13830A) |
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Coatings |
AR/AR @1064nm, R<0.2%;
HR @1064nm >99.5%R, HT @808nm >95%T |
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Other properties of Nd:YAG crystal |
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Structure |
cubic/ garnet |
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Refractive index |
1.8169@1064nm |
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Dn/dt |
+8.9 × 10-6 K-1 |
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Thermal conductivity |
0.129W/cm•K |
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Linear expansion coefficient |
7.8 × 10-6/K along <111> direction |
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Specific heat |
0.59 J/g•K |
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Hardness |
8.5 (Mohs), 1350±35 Kg/mm2 |
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Super Nd:YAG crystals
Nd Doapant Level: 1.3, 1.5, 2.0, 2.5,3.0±0.1at%
Standard Dimensions: 3×3×3mm3, 3×3×1mm3
Diameter: Φ3∼10mm
Length: 1-50mm [Dimensions are usually customized]
Optical quality: <0.5 fringes/inch
Diameter tolerance: ±0.05mm
Length tolerance: ±0.7mm
End face perpendicularity: <5 arc minutes
Parallelism: <10 arc seconds
Flatness: λ/10
Scratch/Dig Code: 10/5
Coating: R<0.25% per surface@1064nm
Spectra properties with concentration
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Nd-Dopant (at%) |
3 |
2.5 |
2 |
1.5 |
1.1 |
1 |
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Fluorescence lifetime(μs) |
140 |
160 |
180 |
200 |
220 |
240 |
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Absorption Coefficient at 808nm (cm-1) |
10.6 |
8.75 |
7.0 |
5.36 |
3.88 |
3.55 |
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