| Products -> Crystal -> YVO4 |
| The yttrium orthovanadate (YVO4) is a positive uniaxial crystal grown with Czochralski method. It has good mechanical and physical properties and is ideal for optical polarizing components due to its wide transparency range and large birefringence. It is an excellent synthetic substitute for Calcite (CaCO3 ) and Rutile (TiO2) crystals in fiber optical applications such as isolators, circulators, beam displacers, Glan polarizers and other polarizing optics, etc. |  |
| Dimension Tolerance | (W±0.1mm) x (H±0.1mm) x (L±0.2mm) |
| Optical Axis Orientation | ±0.5° |
| Surface Flatness | λ/4@633 nm |
| Surface Quality | Better than 20/10 Scratch and Dig |
| Parallelism | < 15 arc seconds |
| Perpendicularity | < 10 arc minutes |
| Clear Aperture | > 90% Central |
| AR-Coating | R<0.25%@1550 nm 40 nm |
App1:
Polarization Beam Displacer
App2:
Polarization Beam Combiner
App3
: Isolator
App4
: Circulator
App5
: Retarder for Interleaver
| YVO4 | Rotator |
| Crystal Structure | Zircon tetragonal, space group D4h |
| Lattice Constants | a=b=7.12, c=6.29 |
| Density | 4.22 g/cm3 |
| Mohs Hardness | 5 glass like |
| Hygroscopic Susceptibility | No |
| Transparency Range | 400nm ~ 5000nm |
| Thermal Conductivity Coefficient | ⊥C: 5.10w/m/K |
| ||C: 5.23 w/m/K | |
| dna/dT=8.5x10-6/K | |
| Thermal Optical Coefficients | dnc/dT=3.0x10-6/K |
| Thermal Expansion Coefficient | aa=4.43x10-6/K |
| ac=4.43x10-6/K | |
| Crystal Class | Positive uniaxial with no=na=nb, ne=nc |
| Refractive
Index |
no=1.9929, ne=2.2154, dn=0.2225, p=6.04°, @630nm |
| no=1.9500, ne=2.1554, dn=0.2054, p=5.72°, @1300nm | |
| no=1.9447, ne=2.1486, dn=0.2039, p=5.69°, @1550nm | |
| Sellmeier Equations (λ in um) | no2=3.77834+0.069736/(λ2 - 0.04724) - 0.0108133λ2 |
| ne2=4.59905+0.110534/(λ2 - 0.04813) - 0.0122676λ2 |