| Description |
YVO4 serves a crucial purpose in the field of optical technologies due to its exceptional characteristics. This positive uniaxial crystal is produced using the Czochralski method, which results in excellent temperature stability, as well as robust physical and mechanical properties. YVO4 is particularly suited for optical polarizing components, owing to its extensive transparency range and significant birefringence. This makes it an outstanding synthetic alternative to traditional Calcite (CaCO3) and Rutile (TiO2) crystals. Its applications are diverse, encompassing fiber optic isolators, circulators, interleavers, beam displacers, and various other polarizing optics, providing superior performance across these technologies. |
| Density |
4.22 g/cm3 |
| Birefringence |
0.2039 @1550 nm (ne-no) |
| Chemical Formula |
YVO4 |
| Coating |
AR-Coating: R<0.2% @1550 nm or 1310 nm ± 40 nm |
| Crystal Class |
Positive uniaxial with no=na=nb, ne=nc |
| Crystal Structure |
Zircon Tetragonal, space group D4h |
| Dimension Tolerance |
Birefringent Wedges: Dimension Tolerance ±0.1mm, Wedge Angle Tolerance±0.1 °, Optical Axis Orientation ±0.5 ° ;
Beam Displacers: (W ± 0.05 mm) × (H ± 0.05 mm) × (L ± 0.1 mm). |
| Flatness |
λ/4 @633 nm |
| Hardness |
5 Mohs (glass-like) |
| Hygroscopic |
Non-hygroscopic |
| Lattice Parameter |
a = b = 7.12 Å; c = 6.29 Å |
| Parallelism |
20 arc sec |
| Perpendicularity |
≤15 arc min |
| Refractive Index |
Birefringence (Δn = ne- no) and Walk-off Angle @ 45°(ρ):
no=1.9929, ne=2.2154, Δn=0.2225, ρ=6.04°@ 630 nm;
no=1.9500, ne=2.1554, Δn=0.2054, ρ = 5.72° @1300 nm;
no=1.9447, ne=2.1486, Δn=0.2039, ρ=5.69° @ 550 nm. |
| Sellmeier Equation |
no2=3.77834+0.069736 /(λ2-0.04724)-0.0108133 λ2
ne2=4.59905+0.110534 /(λ2 - 0.04813)-0.0122676λ2 |
| Size |
Bulk/Finished YVO4 Crystals: up to Φ35 x 50 mm3 and Φ20 x 20 mm3;
Birefringent Wedges: 1.25 mm × 1.25 mm × 0. 5 mm with 13° or 15° wedge, π = 22.5 °;
Beam Displacers: 2.6 × 2.6 × 10 mm3, θ = 45°, Φ = 0° |
| Surface Quality |
20/10 to MIL-PRF-13830B (Scratch/Dig) |
| Thermal Conductivity |
// C: 5.23 W/m/K; ⊥C: 5.10 W/m/K |
| Thermal Expansion Coefficient |
αa=4.43×10-6 /K; αc=11.37×10-6 /K |
| Thermal Optical Coefficient |
dna/dT = 8.5×10-6 /K; dnc/dT = 3.0×10-6 /K |
| Transparency Range |
0.4 - 5 μm |
| Type |
Birefringent Crystals |
