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
Specifications of Nd-YAG Crystal:
Orientation: | <111> or <100> within 5° |
Dimensional Tolerance: | Diameter +/-0.1mm ,Length+/-0.5mm |
Wavefront Distortion: | <λ/8 at 633nm per inch |
Surface Quality: | 20/10 |
Parallelism: | < 10 arc seconds |
Perpendicularity: | < 5 arc minutes |
Surface Flatness: | <λ/10 at 633nm |
Clear Aperture: | Central 95% |
Chamfer: | 0.15×45° |
Coating: | 1.AR@1064nm R<0.2% 2.AR@1064nm R< 0.2% & HT@808nm T>95% 3.HR@1064nm R>99.8% & HT@808nm T>95% 4.HR@1064nm R>99.8% & HR@532nm R>99% & HT@808nm T>95% |
Properties of NdYAG:
Chemical Formula | Nd:Y3A15O12 |
Crystal Structure | Cubic |
Lattice Constants | 12.01Ä |
Concentration | ~ 1.2 x 1020 cm-3 |
Melting Point | 1970 °C |
Density | 4.56 g/cm3 |
Mohs Hardness | 8.5 |
Refractive Index | 1.82 |
Thermal Expansion Coefficient | 7.8 x 10-6 /K [111], 0 – 250 °C |
Thermal Conductivity | 14 W/m /K @20 °C, 10.5 W /m /K @100 °C. |
Lasing Wavelength | 1064 nm |
Stimulated Emission Cross Section | 2.8×10-19 cm-2 |
Relaxation Time of Terminal Lasing Level | 30 ns |
Radiative Lifetime | 550 ms |
Spontaneous Fluorescence | 230 ms |
Loss Coefficient | 0.003 cm-1 @ 1064 nm |
Effective Emission Cross Section | 2.8 x 10-19 cm2 |
Pump Wavelength | 807.5 nm |
Absorption band at pump wavelength | 1 nm |
Linewidth | 0.6 nm |
Polarized Emission | Unpolarized |
Thermal Birefringence | High |