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 ( refer to Table 2).

Transparency Range	High transmittance from 0.4 to 5μm
Crystal Symmetry	Zircon Tetragonal, space group D4h
Crystal Cell	a=b=7.12Å，c=6.29Å
Density	4.22g/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: 5.10 W/m/K
Crystal Class	Positive uniaxial with  no=na=nb, ne=nc
Thermal Optical Coefficient	dna/dT = 8.5×10-6/K；dnc/dT = 3.0×10-6/K
Refractive Indices, Birefringence  (Δn = ne- no)  and Walk-off Angle @ 45° (ρ)	no = 1.9929, ne = 2.2154, Δn = 0.2225, ρ= 6.04°   at 630nm no = 1.9500, ne = 2.1554, Δn = 0.2054, ρ= 5.72°    at 1300nm       no  = 1.9447, ne = 2.1486, Δn = 0.2039, ρ= 5.69°    at 1550nm
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