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YAG crystal combines advantages in many basic properties, it is a stable compound, mechanically
robust, physically hard, optically isotropic, and transparent from below 300nm to beyond 4 microns.
YAG single crystals are able to accept trivalent Rare Earth and Transition Metal groups' laser activator ions,
and can be grown with very low strain, became the most widely produced laser gain host. Using
Czochralski technique, OSICO provide Nd3+:YAG, Er3+:YAG,
Yb3+:YAG and Tm3+ laser crystals,
Cr3+:YAG passive Q-switch elements and pure YAG crystal substrate for optical components.
We also accept contract growth of special doping crystals according to customers' requirements.
Basic Physical Properties of YAG Single Crystal:
| Crystal Structure |
cubic /
garnet |
| Lattice Parameters (Å) |
12.01 |
| Melting Point (°C) |
1970 |
| Mohs Hardness |
8.5 |
| Density (gram/cm3) |
4.55 |
| Transparency Range |
250nm - 5000nm |
| Refractive Index |
1.82 @ 1.0¦Ìm room temperature |
| Thermal Conductivity (W/cm/K) |
0.129 @ 300K |
| Thermal Expansion Coefficients (10-6/K) |
8.2 <100>, 7.7
<110>, 7.8 <111> |
| Specific Heat (J/g/K) |
0.59 @ 300K |
| Young's Modulus |
282 GPa |
| Tensile Strength |
280 MPa |
Laser Gain Properties:
| |
Nd:YAG |
Yb:YAG |
Er:YAG |
| Lasing Wavelength |
1064nm |
1030nm |
2940nm |
| Linewidth |
0.45nm |
9nm |
6nm |
| Stimulated Emission Cross-Section |
2.8 x 10-19cm2 |
0.21 x 10-19cm2 |
0.3 x 10-19cm2 |
| Spontaneous Fluorescent Lifetime |
230 ¦Ìs |
950 ¦Ìs |
100 ¦Ìs |
| Photon Energy |
1.86 x 10-19 J |
1.93 x 110-19 J |
0.68 x 10-19 J |
| Peak Absorption Spectrum |
808.6nm |
942nm |
600-800nm |
| Scatter Losses |
~ 0.002/cm |
~ 0.003/cm |
~ 0.003/cm |
OSICO Specifications:
| |
Nd:YAG |
Yb:YAG |
Er:YAG |
| Dopant Concentration |
0.2-1.2 ¡À 0.1atm% |
5-15 ¡À 0.1atm% |
50 ¡À 0.1atm% |
| Available Rod Diameters |
2.0-20mm |
2.0-20mm |
2.0-6.0mm |
| Dimension Tolerance |
¡À 0.05mm
|
| Available Rod Length |
1.0-200mm |
0.5-100mm |
50-120mm |
| Length Tolerance |
¡À 0.5mm
|
| Parallelism |
< 10
arc seconds (Plano/Plano)
|
| Perpendicularity |
< 5
arc minutes
|
| Chamfer |
0.1mm x
45°
|
| Barrel Finish |
ground,
50-80 microinch roughness |
| Surface Flatness |
¦Ë/10 @ 633nm
|
| Surface Quality |
10/5 Scratch/Dig
|
| Wavefront Distortion |
¦Ë/8 @ 633nm
|
| Extinction Ratio |
> 25
dB |
| Standard AR coating Reflectivity @ 2940nm |
R<0.2% @1064nm |
R<0.2% @1030nm |
R<0.2% @2940nm |
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