Nd：YAG crystal is the most widely used solid-state laser material today. It has been used in the “micro/mini” “DPSS” (Diode Pumped Solid State” laser system to get high quality Red, Green or Blue laser output in which the blue laser of Nd: YVO4 crystal has higher efficiency and the military, scientific, medical and industrial laser systems, high performance scientific laser systems, laser therapy, cosmetology systems, laser marking, laser drilling and other laser material processing systems. Especially, Nd:YAG crystal is the best laser material for the high power, high energy, and Q-switched pulse laser systems. The very wide applications of Nd:YAG crystal in various laser system is because its outstanding performance in physics and mechanics.
Advantages of Nb: YAG
·High gain and efficiency; Low threshold and loss
·Suitable for high-average power lasers
·Good thermal conductivity and thermal shock characteristics
·Large mechanical strength
Specification:
Nd Dopant Level | 0.6-1.3atm% |
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Standard Dimension | Dia3-14mm×1-160mmlength |
Orientation： | <111> or <100> ±5deg |
Dimension Tolerance | ±0.1mm |
Wavefront Distortion | <λ/8 at 632.8nm |
Surface Quality | Better than 20/10 Scratch/Dig |
Parallelism | <10 arc seconds |
Perpendicularity: | <5 arc minutes |
Surface Flatness | <λ/10 at 632.8nm |
Clear Aperature | > Central 95% |
Chamfer | <0.15mm×45deg |
Coating | a)AR@1064nm, R<0.2%; b) AR@1064nm, R<0.2%; HT@808nm, T>95% |
| c)HR@1064nm, R>99.8%; HT@808nm, T>95% |
Properties:
Chemical Formula | Nd:Y3AI5O12 |
Crystal Structure | Cubic |
Lattice Constants | 12.01A |
Concentration | ~1.2×1020cm-3 |
Melting Point | 1970C° |
Density | 4.56g/cm3 |
Mohs Hardness | 8.5 |
Refractive Index | 1.82 |
Thermal Conductivity | 14w/m/K@20°C, 10.5W/m/K@100°C |
Thermal Expansion Coefficient | 7.8×10-6/K[111], 0-250°C |
Lasing Wavelength | 1064nm |
Stimulated Emission Cross Section | 2.8×10-19cm2 |
Relaxation Time of Terninal Lasing Level | 30ns |
Radiative Lifetime Nd=1.1atm% | 550μs |
Loss Coefficient Nd=1.1atm% | 0.003cm-1@1064nm |
Spontaneous Fluorescence Nd=1.1 atm% | 230μs |
Effective Emission Cross Section | 2.8×10-19cm2 |
Pump Wavelength | 807.5nm |
Absorption band at pump wavelength | 1nm |
Linewidth | 0.6nm |
Polarized Emission | Unpolarized |
Thermal Birefringence | High |
