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Nd:YAG(Neodymium-doped Yttrium Aluminium Garnet) laser crystal provides the laser system designer with the most versatile solid state laser source in use today. With thousands of systems in daily use, Nd:YAG continues as the best of the rare earth garnet laser materials characterised by four level laser operation, permitting low threshold pulse or CW operation. Nd:YAG laser rods produce efficient laser output at 1064nm. The systems designer can select from several levels of dopant concentration to optimize laser performance.
Nd: YAG Crystal Properties:
|
Chemical Formula |
Y3Al5O12 |
|
Crystal structure |
Cubic |
|
Lattice constant |
12.01Å |
|
Melting point |
1970°C |
|
Density |
4.5g/cm3 |
|
Reflective Index |
1.82 |
|
Thermal Expansion Coefficient |
7.8x10-6 /K <111> |
|
Thermal Conductivity |
14 W/m/K, 20°C 10.5 W/m/K, 100°C |
|
Mohs hardness |
8.5 |
|
Stimulated Emission Cross Section |
2.8x10-19 cm-2 |
|
Relaxation Time of Terminal Lasing Level |
30 ns |
|
Radiative Lifetime |
550 us |
|
Spontaneous Fluorescence |
230 us |
|
Linewidth |
0.6 nm |
|
Loss Coefficient |
0.003 cm-1 @ 1064nm |
Nd:YAG Specifications:
|
Dopant |
0.3~2.0(±0.1)atm% |
|
Crystal Orientation |
<111> |
|
Wavefront distortion |
λ/8 per inch @ 633 nm |
|
Extinction Ratio |
>28dB |
|
Dimension Tolerances |
Diameter: ±0.025 mm , Length: ±0.5 mm |
|
Surface quality |
10/5 Scratch / Dig |
|
Parallelism |
< 10 arc seconds |
|
Perpendicularity |
< 5 arc minutes |
|
Clear Aperture |
>90% |
|
Flatness |
< λ/10 @ 633 nm |
|
Chamfer |
< 0.1 mm x 45˚ |
|
Barrel Finish |
50-80 micro-inch (RMS) |
|
Anti-Reflection Coating |
R < 0.20% @ 1064 nm per surface |
|
HR Coating |
R>99.8% @ 1064nm and R<5% @ 808nm |
|
Damage threshold |
> 1GW/cm2@ 1064nm, 10 ns and 10 Hz |
Note: The special requirements of Nd:YAG crystals are available upon request.
Nd:YAG Standard Products:
|
Part No. |
Doping |
Dimension(mm) |
Coating |
|
NYG1003050 |
1% |
Φ3X50 |
AR/AR@1064nm |
|
NYG1004040 |
1% |
Φ4x40 |
AR/AR@1064nm |
|
NYG1006060 |
1% |
Φ6x60 |
AR/AR@1064nm |
|
NYG1006080 |
1% |
Φ6x80 |
AR/AR@1064nm |
|
NYG1006100 |
1% |
Φ6x100 |
AR/AR@1064nm |
|
NYG1006120 |
1% |
Φ6x120 |
AR/AR@1064nm |
|
NYG1006110 |
1% |
Φ6.35x110 |
AR/AR@1064nm |
|
NYG1008120 |
1% |
Φ8x120 |
AR/AR@1064nm |
|
NYG1008135 |
1% |
Φ8x135 |
AR/AR@1064nm |
Note: Specific Nd:YAG rods or slabs, and Nd:YAG rods for 946 nm and 1319 nm lasers can be provided. Er:YAG,Yb:YAG and other ion doped YAG crystals are also available upon request.