Yttrium Vanadate (YVO4) Crystal
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).
Basic Properties of YVO4 crystal
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Transparency Range
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High transmittance from 0.4 to 5μm
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Crystal Symmetry
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Zircon Tetragonal, space group D4h
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Crystal Cell
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a=b=7.12Å，c=6.29Å
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Density
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4.22g/cm3
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Mohs Hardness
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5，glass-like
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Hygroscopic Susceptibility
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Non-hygroscopic
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Thermal Expansion Coefficient
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αa = 4.43×10-6/K；αc = 11.37 ×10-6/K
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Thermal Conductivity Coefficient
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//C: 5.23 W/m/K； ⊥ C: 5.10 W/m/K
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Crystal Class
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Positive uniaxial with no=na=nb, ne=nc
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Thermal Optical Coefficient
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dna/dT = 8.5×10-6/K；dnc/dT = 3.0×10-6/K
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Refractive Indices, Birefringence
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no = 1.9929, ne = 2.2154, Δn = 0.2225, ρ= 6.04° at 630nm
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(Δn = ne- no)
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no = 1.9500, ne = 2.1554, Δn = 0.2054, ρ= 5.72° at 1300nm
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and Walk-off Angle @ 45° (ρ)
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no = 1.9447, ne = 2.1486, Δn = 0.2039, ρ= 5.69° at 1550nm
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Sellmeier Equation（λ in μm）
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no2= 3.77834 + 0.069736/(λ2- 0.04724) - 0.0108133λ2
ne2= 4.59905 + 0.110534/(λ2- 0.04813) - 0.0122676λ2
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