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YVO4(Yttrium orthovanadate) is a positive
uniaxial crystal grown with Czochralski method. It has a wide transparency
range and larger birefringence, which make it widely used in many
applications in particular fiber optics field. YVO4 is an excellent synthetic
substitute for calcite and rutile crystal.
Red Optronics supplies a wide variety of finished YVO4 crystals. Our standard specifications for YVO4 follows:
| Diameter |
max.
25mm |
| Length |
max.
30mm |
| Surface
quality |
20/10
scratch/dig |
| Beam
deviation |
<3 arc
min |
| Optical
axis orientation |
+/-0.5° |
| Flatness |
λ/4
@632.8nm |
| Transmission wavefront
distortion |
<λ/2
@632.8nm |
| Coating |
upon
customer's request |
Notes:
To inquire or
order YVO4 birefringent crystals, please provide specifications
as detailed in above.
YVO4 physical
and optical components
| Transparency 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, birefringence(Dn=ne-no) and walk-off angle at 45
deg(ρ) |
No=1.9929,
ne=2.2154, Dn=0.2225, ρ=6.04°, at 630nm
No=1.9500, ne=2.1554,
Dn=0.2054, ρ=5.72°, at 1300nm
No=1.9447, ne=2.1486, Dn=0.2039,
ρ=5.69°, at 1550nm |
| Sellmeier
equation (λ in μm) |
no2=3.77834+0.069736/(λ2-0.04724)-0.0108133λ2 ne2=24.5905+0.110534/(λ2-0.04813)-0.0122676λ2 |
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