Description:
Nd:YAG crystals (Neodymium Doped Yttrium Aluminum Garnet) Nd:YAG is the earliest and most famous laser host crystal. Since it combines great advantages in many basic properties,Nd:YAG is the ubiquitous presence for near-infrared solid-state lasers and their frequency-doubler, tripler, and higher order multiplier.
It is widely used in industrial, medical, military and scientific fields.. Nd:YAG crystals are wildly used in all types of solid-state laser systems-frequency-doubled continuous wave, high-energy Q-switched, and so forth.Its good fluorescent lifetime thermal conductivity and physical strengths makes it suitable for high power lamp pumped laser.
Basic properties:
| Chemical Formula: | Nd:Y3Al5O12 |
| Crystal Structure: | Cubic |
| Lattice Constant: | 12.01Å |
| Melting Point: | 1970°C |
| Density: | 4.5g/cm3 |
| Refractive Index | 1.82 |
| Thermal Expansion Coefficient: | 7.8×10-6 /K <111> |
| Thermal Conductivity（w/m/k）: | 14,20°C 10.5,100°C |
| Mohs Hardness: | 8.5 |
| Stimulated Emission Cross-Section: | 2.8×10-19 cm-2 |
| Relaxation Time of Terminal Lasing Level: | 30ns |
| Radiative Lifetime: | 550 us |
| Spontaneous Fluorescence: | 230 us |
| Linewidth: | 0.6nm |
| Pump Wavelength: | 807.5nm |
| Polarized Emission: | Unpolarized |
| Thermal Birefringence | High |
| Pump Wavelength Absorption Band: | 1nm |
| Loss Coefficient: | 0.003cm-1@1064nm |
specifications:
| Doping(atm%): | 0.3% ~ 2.0% |
| Wavefront Distortion: | λ/8 per inch @ 632.8 nm |
| Dimension Tolerances： | rods with diameter: +0.0/-0.05 mm , Length: ±0.1 mm |
| Surface Quality: | 10/5 Scratch/Dig MIL-PRF-1380A |
| Parallelism: | 20 arc sec |
| Perpendicularity: | < 15 arc min |
| Clear Aperture: | > 90% |
| Surface Flatness: | < λ/8@ 632.8 nm |
| Chamfer: | < 0.2 mm @ 45o |
| Coating | AR/HR/PR coating upon customer’s request |
| Damage Threshold | >500MW/CM2 at 1064nm, TEM00, 10ns, 10Hz (AR-coated) |
| Quality Warranty Period | One year under proper use |
Advantages:
- High gain
- Low threshold
- High efficiency
- Low loss at 1.06 µm
- Good thermal conductivity and thermal shock characteristics
- Mechanical strength
- high optical quality
- Material characteristics that allow for various modes of operation (CW, pulsed, Q-switched, mode locked)
