YVO4
Features and advantages:
- High Refractive Index
- Wide Spectrum Range and High Transmittance
- High Optical Uniformity
- Good Processability and Cost efficient
PRODUCT
Detail
Yttrium Vanadate (YVO4) crystals are positive uniaxial crystals grown using the Czochralski method. They have good mechanical and physical properties and are ideal for optical polarizing components because of their wide transparency range and large birefringence. They are an excellent synthetic substitute for Calcite (CaCO3) and rutile (TiO2) in many applications including fiber optic isolators and circulators, beam displacer, Glan polarizer and other polarizing optics.
|
YVO4 Properties
|
|
|
Wavelength
|
400-5000nm
|
|
Crystal Structure
|
Zircon tetragonal, space group D4h
|
|
Lattice parameters
|
a=b=7.12 Å；c=6.29 Å
|
|
Density
|
4.22 g/cm3
|
|
Mohs Hardness
|
5 Mohs
|
|
Thermal Expansion Coefficient
|
αa=4.43×10-6 /K；αc=11.37×10-6 /K
|
|
Thermal Conductivity
|
//C：5.23 W/m/K；⊥C：5.10 W/m/K
|
|
Thermo-optical coeffecient
|
dna/dT=8.5×10-6 /K；dnc/dT=3.0×10-6 /K
|
|
Crystal Clas
|
Positive uniaxial with no=na=nb, ne=nc
|
|
Refractive Indices,Birefringence( Dn=ne-no) and Walk-Off Angle at 45 deg(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° @ 1550 nm
|
|
|
Sellmeier Equation (λin μm)
|
no2 = 3.77834 + 0.069736 / (λ2 - 0.04724) - 0.0108133 λ2
|
|
ne2 = 4.59905 + 0.110534 / (λ2 - 0.04813) - 0.0122676 λ2
|
|
|
Standard Specifications
|
|
|
Dimensions（mm）
|
Max.25mm
|
|
Length mm
|
Max. 30mm
|
|
Surface quality
|
20/10
|
|
Crystal Orientation
|
12′
|
|
Parallelism
|
10″
|
|
Flatness
|
λ/4 @ 633 nm
|
|
Clear aperture
|
＞90%
|
|
Coating
|
P coating or AR coating
|
|
Mount
|
Upon request
|