Undoped YVO4 is a positive uniaxial birefringent material for polarization optics. Beam displacers, isolators, circulators and Glan-type components use its broad transmission and birefringence; it is distinct from Nd:YVO4 gain material.
Properties, applications and specifications
The yttrium orthovanadate (YVO4) is a positive uniaxial crystal grown with Czochralski method. It has good mechanical and physical properties and 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, beam displacers, Glan polarizers and other polarizing optics, etc.
Properties:
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Transmitting range
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400~5000nm
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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=7.12 °, c=6.29 °
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Density
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4.22 g/cm2
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Hygroscopic Susceptibility
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Non-hygroscopic
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Mohs Hardness
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5 glass like
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Thermal Optical Coefficient
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na /dT=8.5x10-6 /K; dnc /dT=3.0x10-6 /K
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Thermal Conductivity Coefficient
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||C: 5.23 w/m/k; ⊥C:5.10w/m/k
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Crystal Class
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Positive uniaxial with no=na=nb, ne=nc
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Refractive Indices,
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no=1.9929, ne=2.2154, n=0.2225, ρ=6.04°, at 630nm
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Birefringence( n=ne-no)
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no=1.9500, ne=2.1554, n=0.2054, ρ=5.72°, at 1300nm
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and Walk-Off Angle at 45 deg(ρ)
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no=1.9447, ne=2.1486, Dn=0.2039, ρ=5.69°, at 1550nm
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Sellmeier Equation ( l in m)
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no2 =3.77834+0.069736/(2 -0.04724)-0.01081332
ne2 =4.5905+0.110534/(2 -0.04813)-0.01226762 |
Source consistency note: density is listed as 4.22 g/cm2. The area-based unit is inconsistent with a bulk-density specification. The original value and unit are retained; confirm the intended density unit before using this table.
Reference specifications Of YVO4 :
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Diameter:
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Max 25m
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Length:
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Max 35mm
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Surface Quality:
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better than 20/10 scratch/dig
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Beam Deviation:
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< 3 arc min
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Optical Axis Orientation:
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+/-0.2deg
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Flatness:
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< L/4 @632.8nm
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Wavefront Distortion:
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< L/2 @632.8nm
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Coating:
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Coating upon Request
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Source consistency note: the maximum diameter is listed as 25m, beside a maximum length of 35mm. The diameter unit appears inconsistent with the millimetre-scale dimensions in this specification. The original entry is retained; confirm the intended diameter unit before ordering. No corrected diameter is assumed.
Reference-unit note: legacy unit typography is retained in the detailed values. Confirm wavelength units, density units and drawing tolerances when defining an order.
