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Nd:YAG(Neodimium Doped Yttrium Aluminum Garnet) is well-known laser crystal for solid-state crystal material. It is used almost in all types of solid-state lasers systems by means of the following properties:
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High Gain, Low Threshold, High Efficiency.
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Low Loss at 1.06 mm, High Optical Quality.
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Good Mechanical and Thermal Properties.
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Due to the cubic symmetry and high quality,
Nd:YAG is easy to operate with TEM00 mode.
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Physical and Optical Properties |
Chemical Formula |
Nd:Y3Al5O12 |
Structure |
Cubic |
Cell parameter |
12.01? |
Melting point |
1970 oC |
Density |
4.5g/cm3 |
Reflective Index |
1.82 |
Thermal Expansion Coefficien |
7.8x10-6 /K <111> |
Thermal Conductivity (W/m/K) |
14W/m/K, 20o C
10.5W/m/K, 100o C |
Mohs hardness |
8.5 |
Stimulated Emission Cross Section |
2.8x10-19 cm-2 |
Relaxation Time of Terminal Lasing Level |
30 ns |
Radiation Lifetime |
550 m s |
Spontaneous Fluorescence |
230 m s |
Linewidth |
0.6 nm |
Polarized Emission |
Unpolarized |
Loss Coefficient |
0.003 cm-1 @ 1064nm |
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Specifications |
Dopant |
1+/-0.1atm% |
Orientation |
<111> crystalline direction |
Wavefront distortion |
l/8 per inch @ 633 nm |
Extinction Ratio |
>28dB |
Dimension Tolerances |
Diameter: ±0.025 mm , Length: ±0.5 mm |
Surface quality |
10/5 Scratch / Dig per MIL-O-1380A |
Parallelism |
< 10 arc seconds |
Perpendicularity |
< 5 arc minutes |
Clear Aperture |
>90% |
Flatness |
<l/10 @ 633 nm |
Chamfer |
<0.1 mm x 45o |
Barrel Finish |
50-80 micro-inch (RMS) |
Anti-Reflection Coating |
R < 0.20% @ 1064 nm per surface. Damage threshold over 1GW/cm2@ 1064nm, 10 ns and 10 Hz. |
HR Coating |
R>99.8% @ 1064nm and R<5% @ 808nm |
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Note: The special specifications are available upon request. |
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