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YVO4

Yttrium Orthovanadate (YVO4) has good temperature stability with perfect physical and mechanical crystal properties. Because of its large birefringence rate and wide range of wavelength transparency YVO4 is ideal as an optical polarization component. It is a perfect synthetic alternative for Calcite and Rutile crystals in many applications such as fiber optic isolators and circulators, beam displacers and other polarizing optics.

 

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  • Various sizes of bulk and finished high quality YVO4 crystals are available upon request.
Dimension tolerance +/-0.1mm
Wedge Angle tolerance +/-0.1°
Optical axis orientation       +/-0.5°
Flatness λ/4 @ 632.8 nm
Surface Quality 20/10
AR-coating  R<0.2% @1550 or 1310nm
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;α= 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
ne= 4.59905 + 0.110534/(λ2– 0.04813) – 0.0122676λ2
  YVO4 TiO2 CaCO3 LiNbO3
Thermal
Expansion(/℃)
c-axis       11.4×10-6 9.2×10-6 26.3×10-6 16.7×10-6
a-axis 4.4×10-6 7.1×10-6 5.4×10-6 7×10-6
Refractive
Index
no 1.9447 @ 1550nm      2.454 @ 1530nm       1.6346 @ 1497nm    2.2151 @ 1440nm    
ne 2.1486 @ 1550nm 2.710 @ 1530nm 1.4774 @ 1497nm 2.1413 @ 1440nm
  Birefringence(ne-no)  0.2039 @ 1550nm 0.256 @ 1530nm -0.1572 @ 1497nm -0.0738 @ 1440nm
Mohs Hardness 5 6.5 3 5
Deliquescence None None Weak None
Transparency range 0.4-5μm 0.4-5μm 0.35-2.3μm 0.4-5μm
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