Nd:YVO4
Neodymium-doped yttrium vanadate (Nd:YVO4) crystal is an excellent laser crystal, suitable for manufacturing laser-diode-pumped lasers, especially low- and medium-power lasers. Compared with Nd:YAG, Nd:YVO4 has a higher absorption coefficient for pump light and a larger stimulated emission cross-section. Laser-diode-pumped Nd:YVO4 crystals, combined with high nonlinear coefficient crystals such as LBO, BBO and KTP, can achieve good frequency-doubling conversion efficiency and produce all-solid-state lasers outputting near-infrared, green, blue to ultraviolet light, with the advantages of low threshold, high slope efficiency and linearly polarized output. Nd:YVO4 lasers are now widely used in machinery, material processing, spectroscopy, wafer inspection, displays, medical testing, laser printing, data storage and many other fields. Moreover, Nd:YVO4 diode-pumped solid-state lasers are rapidly replacing the traditional market of water-cooled ion lasers and lamp-pumped lasers, especially in terms of miniaturization and single-longitudinal-mode output. ★ Low threshold, high slope efficiency ★ Insensitive to pump wavelength ★ Large stimulated emission cross-section ★ High absorption coefficient ★ Linearly polarized output
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Overview
Specifications
| Parameter | Value |
|---|---|
| Atomic Density | ~1.37x10^20 atoms/cm^3 |
| Crystal Structure | Zircon Tetragonal; space group D4h; a=b=7.12, c=6.29 |
| Coefficient of Thermal Expansion | a=4.43x10^-6/K, c=11.37x10^-6/K |
| Thermo-Optic Coefficient | dna/dT=8.5x10^-6/K, dnc/dT=3.0x10^-6/K |
| Stimulated Emission Cross Section | 25.0x10^-19cm^2 @1064 nm |
| Absorption Coefficient | 31.4 cm^-1@808 nm |
| Absorption Length | 0.32 mm @808 nm |
| Gain Bandwidth | 0.96 nm (257 GHz) @1064 nm |
| Polarization Characteristics | p-polarization, parallel to the optical axis |
| Semiconductor Pumping Efficiency | > 60% |
| Lattice Parameters | Positive uniaxial crystal, no=na=nb, ne=nc, no=1.9573, ne=2.1652, @1064nm no=1.9721, ne=2.1858, @808nm no=2.0210, ne=2.2560, @532nm |
| Sellmeier Equation (Pure YVO4, λ in μm) | no^2=3.77834+0.069736/(λ^2-0.04724)-0.0108133λ^2 ne^2=4.59905+0.110534/(λ^2-0.04813)-0.0122676λ^2 |
| Specification - Nd Doping Concentration | 0.1-5.0 atm% |
| Specification - Scattering | No scattering under He-Ne laser illumination |
| Pointing Accuracy | ±0.5° |
| Clear Aperture Dimension | >90% |
| Parallelism | <10 arcsec |
Datasheet
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