Broad transparent spectral range 0.4μm to 5μm.
Large birefringence.
Good mechanical and physical property.
Applications: Fiber optical isolators and circulators, Beam displacer, Glan polarizers, other polarizing optics.
Competitive price.
Strict quality control.
Technical support.
The Yttrium Orthovanadate (YVO4) is a positive uniaxial crystal grown with Czochralski method. It has good temperature stability and physical and mechanical properties. It is ideal for optical polarizing components because of its wide transparency range and large birefringence. It is an excellent synthetic substitute for Calcite (CaCO3) and Rutile (TiO2) crystals in many applications including fiber optic isolators and circulators, interleavers, beam displacers and other polarizing optics.
Basic Properties
| Transparency Range | 400-5000nm |
| Crystal Structure | Zircon Tetragonal space group D4h |
| Lattice Parameter | a=b=7.12 Å; c=6.29Å |
| Density | 4.22 g/cm3 |
| Mohs Hardness | 5, glass-like |
| Hygroscopic Susceptibility | Non-hygroscopic |
| Thermal Expansion Coefficient | αa=4.43×10-6/K αc=11.37×10-6/K |
| Thermal Conductivity Coefficient | //C:5.23 W/m/K ⊥C:5.10W/m/K |
| Thermal Optical Coefficient | dna/dT=8.5×10-6/K dnc/dT=3.0×10-6/K |
| Crystal Class | Positive uniaxial with no=na=nb, ne=nc |
| Refractive Index | no=1.9929,ne=2.2154 |
| Birefringence (Δn=ne-no) | Δn=0.2225@630nm |
| Walk-Off Angle at 45 deg(ρ) | ρ=6.04° at 630nm |
Sellmeier Equation (λ in µm) | no2=3.77834+0.069736/(λ2-0.04724)-0.0108133λ2 |
| ne2=4.59905+0.110534/(λ2-0.04813)-0.0122676λ2 |
| Aperture | 1.0×1.0 mm2 to 10×10 mm2 |
| Dimension Tolerance | ±0.1mm |
| Wedge Angle Tolerance | ±0.1 ° |
| Optical Axis Orientation | ± 0.5 ° |
| Flatness | λ/4 @633 nm |
| Surface Quality (Sctrach/Dig) | 20/10 to MIL-PRF-13830B |
| AR-Coating | R < 0.2%@1550 or 1310nm |
| Standard Size | 1.25mm×1.25mm×0. 5mm with 13 ° or 15 ° wedge, phi=22.5 ° |
