Nd:YAG
Our Nd:YAG, also called neodymium-doped yttrium aluminum garnet, is a laser-medium crystal with good overall performance for solid-state lasers. Flashlamps excite atoms in the Nd:YAG crystal, producing amplified light at a specific wavelength (1064 nm). Nd:YAG is widely used in biophysics, medicine, military applications, machinery, scientific research, and construction. It offers high optical quality and good mechanical and thermal properties. Nd:YAG is one of the mature laser crystals obtained by doping YAG with Nd ions. Its absorption bands are 730-760nm and 790-820nm, and it is commonly pumped by flashlamps or laser diodes. The typical laser emission peak is 1064nm; laser emission at 946nm, 1120nm, 1320nm, and 1440nm can also be obtained through certain measures. Q-switching and mode locking can produce different laser wavelengths, including 532nm, 266nm, and 213nm, and pulse widths of 10-25ns. Nd:YAG is widely used in solid-state laser systems, including frequency-doubled continuous-wave and high-energy Q-switched systems. Highly doped crystals are generally used in pulsed lasers, while lightly doped crystals are generally used for continuous-wave output.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Nd concentration tolerance | 0.1- 2.5(+/-0.1)atm% |
| Orientation | [001] or [110] or [111] <±0.5° |
| Parallelism | 10〞 |
| Perpendicularity | 5ˊ |
| Surface Quality | 10-5(MIL-O-13830A) |
| Wavefront distortion [@632 nm] | λ/4@632 nm |
| Surface Flatness [@632 nm] | λ/8@632 nm |
| Clear Aperture Dimension | >95 % |
| Chamfer | <0.2×45° |
| Length Tolerance | +0.5/-0mm |
| Thickness / Diameter Tolerance | ±0.05 mm |
| Maximum dimensions | dia (3~12.7)×(3~150) mm |
| Damage Threshold [@1064 nm 10 ns 10 Hz] | >750 MW/cm²@1064 nm 10 ns 10 Hz |
| Extinction ratio | >30 dB (depending on actual dimensions) |
| Precision grinding | 400 grit |
| Crystal Structure | Cubic – la3d |
| Lattice constant | 12.01 Å |
| Density | 4.56 g/cm³ |
| Melting point | 1950 °C |
| Thermal conductivity [@ 25°C] | 14 W·m-1·K-1 |
| Specific heat | 0.59 J·g-1·K-1 |
| Fracture stress | 1.3-2.6*10³ kg/cm² |
| Thermal expansion rate / (10-6·K-1 [@25°C）] | [100] Orientation–8.2 |
| Thermal expansion rate / (10-6·K-1 [@25°C）] | [110] Orientation–7.7 |
| Thermal expansion rate / (10-6·K-1 [@25°C）] | [111] Orientation–7.8 |
| Hardness | 8.5 Mohs |
| Young's modulus | 317 GPa |
| Shear modulus | 54.66 Gpa |
| Extinction ratio | 25 dB |
| Poisson's ratio | 0.25 |
| Laser transition | ⁴F₃/₂ →> ⁴I₁₁/₂ |
| Laser transition wavelength λl | 1064 nm |
| Pump transition wavelength λp | 808 nm |
| Pump transition bandwidth Δλp | <4 nm |
| Laser transition bandwidth Δλl | ~0.6 nm |
| E-20 cm2 | 6.7 |
| E-20 cm2 | 28 |
| Pump transition saturation intensity φp | 12 kW / cm2 |
| Laser transition saturation intensity φl | 2.6 kW / cm2 |
| Laser transition saturation fluence Γl,sat | 0.6 J / cm2 |
| Minimum pump intensity Imin | ~0 kW / cm2 |
| Upper laser tube lifetime τ | 0.26 ms |
| Quantum defect fraction | 0.24 |
| Fractional heat generation | 0.37 |
| Refractive index [@1.064 µm] | 1.8197 @1.064 µm |
| Fluorescence lifetime | 230 µs |
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Datasheet
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