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YVO4 crystal


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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.
Lasertec’s Specifications Of YVO4 :
Diameter:
Max 25m
Length:
Max 35mm
Surface Quality:
better than 20/10 scratch/dig
Beam Deviation:
< 3 arc min
Optical Axis Orientation:
+/-0.2deg
Flatness:
< l/4 @632.8nm
Wavefront Distortion:
< l/2 @632.8nm
Coating:
Coating upon Request

Properties:
Transmitting range
400~5000nm
Crystal Symmetry
Zircon tetragonal, space group D4h
Crystal Cell
a=b=7.12 °, c=6.29 °
Density
4.22 g/cm2
Hygroscopic Susceptibility
Non-hygroscopic
Mohs Hardness
5 glass like
Thermal Optical Coefficient
Dna /dT=8.5x10-6 /K; dnc /dT=3.0x10-6 /K
Thermal Conductivity Coefficient
||C: 5.23 w/m/k; ⊥C:5.10w/m/k
Crystal Class
Positive uniaxial with no=na=nb, ne=nc
Refractive Indices,
no=1.9929, ne=2.2154, Dn=0.2225, ρ=6.04°, at 630nm
Birefringence( Dn=ne-no)
no=1.9500, ne=2.1554, Dn=0.2054, ρ=5.72°, at 1300nm
and Walk-Off Angle at 45 deg(ρ)
no=1.9447, ne=2.1486, Dn=0.2039, ρ=5.69°, at 1550nm
Sellmeier Equation ( l in mm)
no2 =3.77834+0.069736/(l2 -0.04724)-0.0108133l2
ne2 =4.5905+0.110534/(l2 -0.04813)-0.0122676l2
 

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