Overview: Nd:YVO4 crystal is one of the most efficient laser host crystal currently
existing for diode laser pumped solid state lasers. Its large
stimulated emission cross-section at lasing wavelength, high
absorption coefficient and wide absorption bandwidth at pump
wavelength, high laser induced damage threshold as well as good
physical, optical and mechanical properties make Nd:YVO4 an
excellent crystal for high power, stable and cost effective diode
pumped solid-state lasers. General Specifications Of Nd:YVO4: | Nd Dopant Level | 0.1-5.0atm% | | Scattering | Invisible, probed with a He-Ne laser | | Orientation Tolerance | ±0.5deg | | Dimensional Tolerance | ±0.1mm | | Surface Quality | 10/5 Scratch and Dig | | Clear Aperture | >90% | | Surface Flatness | <λ/10@633nm | | Wavefront Distortion | <λ/8@633nm | | Parallelism | <10 arc seconds | | End-faces Configuration | Plano/Plano | | Intrinsic Loss | < 0.1%cm-1 | | Coating | AR1064&HT808: R<0.1%@1064nm, R<5%@808nm
HR1064&HT808&HR532: R>99.8%@1064nm, R<5%@808nm,
r="">99%@532nm
AR1064: R<0.1%@1064nm |
Physical Properties of Nd:YVO4: | Atomic Density | ~1.37x1020 atoms/cm3 | | Crystal Structure | Zircon Tetragonal, space group D4h | | a=b=7.12, c=6.29 | | Density | 4.22 g/cm3 | | Mohs Hardness | Glass-like, ~5 | | Thermal Expansion Coefficient | a=4.43x10-6/K, c=11.37x10-6/K |
Optical Properties of Nd:YVO4 (typically for 1.1 atm% Nd:YVO4, a-cut crystals) | Lasing Wavelengths | 914nm, 1064nm, 1342nm | | Thermal Optical Coefficient | dna/dT=8.5x10-6/K, dnc/dT=3.0x10-6/K | | Stimulated Emission Cross-Section | 25.0x10-19cm2@1064nm | | Fluorescent Lifetime | 90us @808nm, (50us @808 nm for 2atm% Nd doped) | | Absorption Coefficient | 31.4 cm-1@808nm | | Absorption Length | 0.32 mm @808nm | | Intrinsic Loss | Less than 0.1% cm-1@1064nm | | Gain Bandwidth | 0.96 nm (257 GHz) @1064nm | | Polarized Laser Emission | p polarization, Parallel to optic axis (c-axis) | | Diode Pumped Optical to Optical Efficiency | >60% | | Crystal Class | Positive uniaxial, 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(for pure YVO4 crystals, λ in um) | no2=3.77834+0.069736/(λ2-0.04724)-0.0108133λ2 ne2=4.59905+0.110534/(λ2-0.04813)-0.0122676λ2 |
Laser Properties (Nd:YVO4 VS Nd:YAG): | Laser Crystal | Nd doped | σ | α | τ | La | Pth | η | | (atm%) | (x10-19cm2) | (cm-1) | (cm-1) | (mm) | (mW) | ( %) | | Nd:YVO4(a-cut) | 1.1 | 25 | 31.2 | 90 | 0.32 | 78 | 48.6 | | 2 | 72.4 | 50 | 0.14 | | Nd:YVO4(c-cut) | 1.1 | 7 | 9.2 | 90 | | 231 | 45.5 | | Nd:YAG | 0.85 | 6 | 7.1 | 230 | 1.41 | 115 | 38.6 |
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