Nd:YVO4
Nd:YVO4 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.Capabilities:
| Nd dopant: | 0.27%, 0.3%, 0.4%, 0.5%, 0.7%, 1.0%, 2.0%, 3.0% |
| Width x Height: | 1x1 ~ 16x16mm |
| Length: | 0.02 ~ 20mm |
Specifications:
| Orientation: | a-cut( ± 0.5° ) |
| Dimensional Tolerance: | +/-0.1mm |
| Wavefront Distortion: | <λ/8 at 633nm |
| Surface Quality: | 20/10 |
| Parallelism: | < 10 arc seconds |
| Perpendicularity: | < 5 arc minutes |
| Surface Flatness: | <λ/10 at 632.8nm |
| Clear Aperture: | Central 95% |
| Chamfer: | 0.15x45° |
| Coating: | 1.AR@1064nm R<0.1% 2.AR@1064nm R< 0.1% & HT@808nm T>95% 3.HR@1064nm R>99.8% & HR@532nm R>99% & HT@808nm T>95% |
Properties:
| Atomic Density | ~1.37x1020 atoms/cm2 |
| 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 | aa=4.43x10-6/K, ac=11.37x10-6/K |
| Thermal Conductivity Coefficient | ||C: 5.23 W/m/K; ^C: 5.10 W/m/K |
| Lasing Wavelengths | 914nm, 1064 nm, 1342 nm |
| 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 |
| Thermal Optical Coefficient | dna/dT=8.5x10-6/K, dnc/dT=3.0x10-6/K |
| Stimulated Emission Cross-Section | 25.0x10-19 cm2 , @1064 nm |
| Fluorescent Lifetime | 90 ms (about 50 ms for 2 atm% Nd doped) @ 808 nm |
| Absorption Coefficient | 31.4 cm-1 @ 808 nm |
| Absorption Length | 0.32 mm @ 808 nm |
| Intrinsic Loss | Less 0.1% cm-1 , @1064 nm |
| Gain Bandwidth | 0.96 nm (257 GHz) @ 1064 nm |
| Polarized Laser Emission | p parallel to optic axis (c-axis) |
| Diode Pumped Optical to Optical Efficiency | > 60% |
Sellmeier Equation (for pure YVO4 crystals)
no2=3.77834+0.069736/(l2 - 0.04724) - 0.0108133l2
no2=4.59905+0.110534/(l2 - 0.04813) - 0.0122676l2