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High Gain,High Efficiency,low threshold
High optical homogeneity and low loss at 1064nm
Good mechanical and thermal properties
Stable physical properties and humidity
Nd:YAG has been
and continues to be the most mature and most widely used crystals for lasers,
no matter solid state or lamp pumped, CW or pulsed.It possesses a combination
of properties uniquely favorable for laser operations. We have developed the
state-of-the-art crystal growing technology to enable the availability of
large, high quality crystal
Lasertec’s Specifications of Nd-YAG Crystal:
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Orientation: |
<111> or <100> within 5° |
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Dimensional Tolerance: |
Diameter +/ |
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Wavefront Distortion: |
<λ/8 at 633nm per inch |
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Surface Quality: |
20/10 |
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Parallelism: |
< 10 arc seconds |
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Perpendicularity: |
< 5 arc minutes |
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Surface Flatness: |
<λ/10 at 633nm |
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Clear Aperture: |
Central 95% |
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Chamfer: |
0.15x45° |
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Coating: |
1.AR@1064nm R<0.2% |
Properties of NdYAG:
|
Chemical Formula |
Nd:Y |
|
Crystal Structure |
Cubic |
|
Lattice Constants |
12.01Ä |
|
Concentration |
~ 1.2 x |
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Melting Point |
|
|
Density |
|
|
Mohs Hardness |
8.5 |
|
Refractive Index |
1.82 |
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Thermal Expansion Coefficient |
7.8 x 10-6 /K [111], 0 - |
|
Thermal Conductivity |
14 W/m /K @ |
|
Lasing Wavelength |
1064 nm |
|
Stimulated Emission Cross Section |
2.8x10-19 cm-2 |
|
Relaxation Time of Terminal Lasing Level |
30 ns |
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Radiative Lifetime |
550 ms |
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Spontaneous Fluorescence |
230 ms |
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Loss Coefficient |
|
|
Effective Emission Cross Section |
2.8 x 10-19 cm2 |
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Pump Wavelength |
807.5 nm |
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Absorption band at pump wavelength |
1 nm |
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Linewidth |
0.6 nm |
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Polarized Emission |
Unpolarized |
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Thermal Birefringence |
High |