YVO4 Crystal

The yttrium orthovanature (YVO4) is a positive uniaxial crystal grown with the Czochralski method. It has good temperature stability, along with good physical and mechanical properties, and 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, beam displacers and polarizing optics, etc.

 

 

Properties of YVO4 Crystals

Transparency Range:

High transmission from 0.4-5µm

Crystal Symmetry:

Zircon Tetragonal, Space group D4h

Crystal Cell:

a = b = 7.12A
c = 6.29A
Density:
4.22g/cm3
Mohs Hardness:
5, (glass-like)
Hygroscope Susceptibility:

Non-hygroscope

Thermal Expansion Coefficient:

αa = 4.43 x10-6/K

αc = 11.37 x10-6/K
Thermal Conductivity Coefficient:
C|| : 5.23W/m/K
Cperp : 5.10W/m/K
Crystal Class:
Positive uniaxial with no = na = nb
ne = nc
Thermal Conductivity Coefficient:
dna/dT = 8.5×10-6/K
dnc/dT = 3.0×10-6/K
Refractive Indices, Birefringence (Δn = ne – no)
Walk-off Angle @ 45° (ρ):
@ 0.63mm
no = 1.9929
ne = 2.2154
Δn = 0.2225
ρ = 6.04°
@ 1.30mm
no = 1.9500
ne = 2.1554
Δn = 0.2054
ρ = 5.72°
@1.55mm
no = 1.9447
ne = 2.1486
Δn = 0.2039
ρ = 5.69°
Seamier Equation (λ in µm)
no2 = 3.77834 + 0.069736 / (λ2 – 0.04724) – 0.0108133λ2
ne2 = 4.59905 + 0.110534 / (λ2 – 0.04813) – 0.0122676λ2

 

 

High quality YVO4 crystals with different dimensions are available. Sinoceramics can provide large quantities (~10,000 pcs/month) of YVO4 wedges and YVO4 displacers used in fiber optical isolators and circulators.