Nd:YVO4
Neodymium-doped yttrium vanadate (Nd:YVO4) is an excellent commercial laser crystal, used for laser-diode pumping, especially in low- and medium-power lasers. Compared with Nd:YAG, its 808 nm pump bandwidth is about 5 times larger and its 1064 nm stimulated emission cross-section about 3 times larger, with low laser threshold and high slope efficiency. It is a uniaxial birefringent crystal with linearly polarized output. Doping concentration 0.1-3%, maximum size up to ϕ20x40 mm3.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Laser Crystal | Nd:YVO4 （a-cut） |
| Stimulated Emission Cross Section σ (×10-19cm2) | 25 |
| Absorption Coefficient α | 72.4 |
| Fluorescence Lifetime τ (μs) | 50 |
| Absorption Length Lα | 0.14mm |
| Threshold Power Pth | 78mW |
| Pump Quantum Efficiency ηS | 48.6% |
| Crystal Structure | Tetragonal crystal system; space group D4h-I4/amd |
| Unit Cell Parameters | a=b=7.1193 Å，c=6.2892 Å |
| Atomic Density | 1.26×1020 at/cm^3（Nd 1.0%） |
| Mohs Hardness | 4-5 Mohs (similar to glass) |
| Coefficient of Thermal Expansion (300 K) | αa=4.43×10^-6 /K αc=11.37×10^-6 /K |
| Thermal Conductivity (300 K) | //C：5.23 W/m/K ⊥C:：5.10 W/m/K |
| Thermo-optic Coefficient (300 K) | dno/dT=8.5×10^-6 /K dne/dT=2.9×10^-6 /K |
| Stimulated Emission Cross Section | 25×10-19 cm^2 @ 1064 nm |
| Absorption Coefficient | 31.4 cm^-1 @ 810 nm |
| Intrinsic Loss | 0.02 cm^-1 @ 1064 nm |
| Gain Bandwidth | 0.96 nm @ 1064 nm |
| Polarized Laser Radiation | π-polarization; parallel to the optical axis (c-axis) |
| Optical-to-Optical Conversion Efficiency | ＞60% |
| Sellmeier Equation (Pure YVO4, λ in μm) | no2 = 3.77834 + 0.069736 / (λ^2- 0.04724) - 0.010813 λ^2 ne2 = 4.59905 + 0.110534 / (λ^2 - 0.04813) - 0.012676 λ^2 |
| Flatness | ≤λ/8 @ 633 nm （L≧2.5 mm） ≤λ/4 @ 633 nm （L＜2.5 mm） |
| Transmitted Wavefront Distortion | ≤λ/4 @ 633 nm |
| Parallelism | 20″ |
| Perpendicularity | ≤15′ |
| Angle Tolerance | ≤0.5° |
| Warranty Period | One year (normal use) |
Applications
Datasheet
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