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Yttrium Vanadate (YVO4)

YVO4 is a positive uniaxial crystal grown by the Czochralski method. It has good mechanical properties, large birefringence and a wide transparency range, which make it ideal for many optical polarizing components, such as beam displacer and Glan polarizer. Compared to calcite, YVO4 has better temperature stability, mechanical properties, and is not susceptible to moisture. Compared to Rutile (TiO2), YVO4 is easier thus cheaper to polish.



                                                 Figure 1: External transmittance curve for 1mm YVO4 crystal


  Transparency Range (nm) 400~5000
  Crystal Symmetry Class Tetragonal, D4h
  Lattice Constant (Å) a=b=7.12, c=6.29
  Crystal Class Positive Uniaxial
  Hygroscopic Susceptibility Non-hygroscopic
  Thermal Conductivity (W/m·K) ||C: 5.23       C: 5.10  
  Constant of Dispersion (dn/dT)  (/°K) dno/dT=8.5X10-6
  Coefficient of Thermal Expansion (/°K)
||C: 11.37X10-6
C: 4.43X10-6
  Refractive Indices no=1.9929, ne=2.2154 at 630nm
no=1.9447, ne=2.1486 at 1550nm
  Sellmeier Equation (λ in um) no2=3.77834+0.069736/(λ2-0.04724)+0.0108133·λ2
  Density (g/cm3) 4.22  
  Mohs Hardness 5  
  Table 1: YVO4 Properties

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