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Yttrium Vanadate (YVO4) Crystal
Undoped YVO4 (Yttrium Vanadate) is widely used in many beam displace because of
its large birefringence. Good physical and favorable properties also make YVO4
well suited for compact fiber optical components, such as isolators,
circulators, and polarizer etc..
Comparison with other birefringent crystals
Compared with Calcite, YVO4 has better temperature stability, physical and
mechnical properties. And it is hard for Calcite to obtain high optical quality
because of its low susceptibility to moisture and low hardness. Compared with
Rutile (Tio2) which has high hardness, YVO4 is easier to be handled in optical
surface processing which greatly reduces manufacturing cost, especially in
batch production. Compared with LiNbO3, although they have similar mechanical
and physical properties, YVO4 has three times larger birefringence, which makes
your design more compact.
Basic properties of YVO4:
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High transmittance 0.4-5μm |
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Crystal Symmetry |
Zircon Tetragonal，Space groupD4h |
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Lattice Parameters |
a=b= |
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Density |
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Mohs |
5 (glass like) |
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Deliquescence |
NO |
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Thermal Expansion Coefficient |
αa=4.43×10-6/K ；αc=11.37×10-6/K |
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Thermal Conductivity |
//C: 5.23W/m/K ⊥C: 5.10W/m/K |
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Crystal Class |
Positive uniaxial with no=na=nb,ne=nc |
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Thermo-optic Coefficient |
dno/dT=8.5×10-6/K |
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Refractive Indices Birefringence Coefficient (△ n = ne-no) and Walk Angle at45° |
no=1.9929, ne=2.2154, △n=0.2225,p=6.04°at |
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Sellmeier Equation(I in mm)： |
no 2 =3.77834+0.069736/（λ2）-0.0108133λ2 -0.04724 ne 2 =4.59905+0.110534/（λ2）-0.0122676λ2 -0.04813 |
Pure YVO4 used in optical circulators and optical beam displacers
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Dimension Tolerance |
W(± |
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Optical Axis Orientation |
±0.5° |
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Parallelism |
<10〞 |
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Perpendicularity |
5′ |
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Flatness |
λ/8 @ 632.8 nm |
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Surface Quality |
20/10 MIL-PRF-13830B |
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AR-coating |
R<0.2%@1550or1310nm±0.4nm R<0.1%@1064nm For high power laser |
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Standard Size |
5.2×2.5×25 |
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Note: Other Sizes and Coating Are Available Upon Request |
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