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Neodymium Doped Yttrium Aluminum Garnet (Nd:YAG)
Nd:YAG crystal is the most widely used laser crystal on solid-state laser. We are able to stably supply the quality of Nd;YAG rods with high optical homogeneity, consistent performance, high processing accuracy and on time delivery.
1. Basic Properties (1.0 atm% Nd doped)
Chemical Formula | Nd:Y3Al5O12 |
Crystal Structure | Cubic |
Lattice Constants | 12.01Å |
Concentration | ~ 1.2 x 1020cm-1 |
Melting Point | 1970oC |
Density | 4.56 g/cm3 |
Mohs Hardness | 8.5 |
Refractive Index | 1.82 at 1064nm |
Thermal Expansion Coefficient | 7.8 x 10-6 /K {111}, 0 - 250 oC |
Thermal Conductivity | 14 W/m/K at 20 oC; 10.5 W/m/K@100 oC |
Lasing Wavelength | 1064 nm |
Stimulated Emission Cross Section | 2.8 x 10-19cm-2 |
Relaxation Time of Terminal Lasing Level | 30 ns |
Radiative Lifetime | 550 ms |
Spontaneous Fluorescence | 230 ms |
Loss Coefficient | 0.003 cm-1 at 1064 nm |
Effective Emission Cross Section | 2.8 x 10-19cm2 |
Pump Wavelength | 807.5 nm |
Absorption band at pump wavelength | 1 mm |
Line width | 0.6 mm |
Polarized Emission | Unpolarized |
2. Standard Products specification
Dopant Concentration (atomic %): 0.6%~ 1.1%Orientation: <111> crystalline directionWavefront distortion: l/8 per inch at 633 nmExtinction Ratio :>28 dBDimension Tolerance: + 0.05mm for diameter, ± 0.2mm for lengthParallelism: < 10 arc secondsPerpendicularity: < 5 arc minutesSurface Quality: 10-5 scratch and digSurface Flatness: < l /10 at 633nmAR Coating: R< 0.1 % at 1064nmDamage Threshold: > 500MW/cm2 at 1064nm, 10ns, 10HzNd:YAG crystal