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Undoped Yttrium Vanadate (YVO4) Crystals

Pure YVO4 crystal is a positive uniaxial crystal with a wide transparency range in infrared, a  large birefringence, and excellent mechanical properties. It has been widely used in fabricating polarizers, fiber optic isolators, circulators, and beam displacers.

Basic Properties of Pure YVO4

Transparency Range: 400 - 4000 nm

material-yvo.GIF (11376 bytes)

Transmission Curve

Crystal Symmetry:Zircon Tetragonal,  D4h

Lattice Constants: a=b=7.12Å; c=6.29 Å

Density: 4.22 g/cm3
Therm-Optic Coefficients:
dno/dT= 8.5 x 10-6 /oC
dne/dT= 3.0 x 10-6/oC
Damage Threshold ( 10ns, 10Hz)
at 1064 nm 100 MW/cm2
at 532 nm 50 MW/cm2
Optical Homogeneity: Δn < 10-6/cm
Mohs Hardness: 5
Thermal Expansion Coefficients αa = 4.4 x 10-6/K
αc = 11.4 x 10-6/K
Linear Absorption Coefficient: α<0.01cm-1 from 400 to 5000 nm

Sellmeier Equation (λ in µm):
no2=3.77834 + 0.069736/(λ2 - 0.04724) - 0.0108133λ2
ne2=4.59905 + 0.110534/(λ2 - 0.04813) - 0.0122676λ2

 Wavelength(nm) no ne Birefringence
(Δn=ne-no)		 Walk-off Angle
 at 45°
1550 1.9447 2.1486 0.204 -5.67
1300 1.9500 2.1554 0.205 -5.70
1064 1.9571 2.1650 0.208 -5.74
532 2.0177 2.2508 0.233 -6.22

Specifications of Pure YVO4 Components

Dimension Tolerance

±0.05 mm
Wedge Angle Tolerance 0.1°

Surface Quality

20/10 Scratch and Dig

Optical Axis Orientation +/-0.5°

Parallelism

<15 arc sec 

Perpendicularity <10 arc min

Flatness

λ/6 @ 632.8 nm

Transmission Wavefront Distortion

< λ/4 @632.8 nm

AR-coating

R<0.3% available upon request

 

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