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Nd:GGG is an optimal crystal for solid-state heat-capacity laser because of its
high thermal diffusivity and large diameter resulting from its easiness of
growth with flat interface between solid and melt. It is also a candidate for
high average power laser with high pulse energy.
Advantages of Nd:GGG Crystals
l
Suitable for high energy output at heat-capacity operation
l
Large crystal diameter with good optical quality
Specifications
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Dopant concentration |
0.5~3at% |
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Orientation |
[111] within� 5� |
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Wavefront distortion |
≤ 0.5λ/inch@632.8nm(for the rod) |
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Extinction ratio |
≥ 20dB @632.8nm(for the rod) |
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Sizes |
Diameter 2~70mm, Length 3~100mm
Upon request of customer |
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Dimensional tolerances |
Diameter:+0.00"/-0.002", Length: � 0.02"
|
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Barrel finish |
Ground Finish with 400# Grit or polished |
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Parallelism |
≤ 10 arc seconds(for the rod) |
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Flatness |
≤ λ/4@632.8nm(for the rod) |
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AR coating reflectivity |
≤0.25% @1060nm |
Optical and Spectral Properties of Nd:GGG Crystals
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Laser transititon |
4F3/2→4I11/2 |
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Laser wavelength |
1060nm |
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Fluorescence lifetime |
240μs |
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Index of refraction |
1.94@1060nm |
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Diode pump band |
808nm, 881nm |
Physical and Chemical Properties
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Crystal Structure |
Cubic |
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Lattice Constant |
12.383 � |
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Moh Hardness |
8 |
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dn/dT |
17 x10-6/K |
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Poisson's Ratio |
0.28 |
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Melting Point |
1725�C |
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Density |
7.1 g/cm3 |
|
Thermal Expansion |
8 x 10-6�C-1 |
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