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YVO4

The Yttrium Orthovanadate (YVO4) is a positive uniaxial crystal grown with Czochralski method.

It has good temperature stability and physical and mechanical properties.

It 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 and other polarizing optics.

Comparison of basic properties between YVO4 and Other Birefringent Crystals.

 

YVO4

TiO2

CaCO3

LiNbO3

Thermal

Expansion (/)

c-axis

11.4x10-6

9.2x10-6

26.3x10-6

16.7x10-6

a-axis

4.4x10-6

7.1x10-6

5.4x10-6

7x10-6

Refractive

 Index

no

1.9447

@1550nm

2.454

@1530nm

1.6346

@1497nm

2.2151

@1440nm

ne

2.1486

@1550nm

2.710

@1530nm

1.4774

@1497nm

2.1413

@1440nm

Birefringence(ne-no)

0.2039

@1550nm

0.256

@1530nm

-0.1572

@1497nm

-0.0738

@1440nm

Mohs Hardness

5

6.5

3

5

Deliquescence

None

None

Weak

None

Transparency range

0.4-5μm

0.4-5μm

0.35-2.3μm

0.4-5μm

 
 
 


DELN provides YVO4 crystals are widely used in fiber-optic isolators, beam displacers, optical circulators, and interleavers, etc.



Application

 



 

Specifications

Dimension Tolerance

±0.1mm

Optical Axis Orientation

±0.5°

Surface Flatness

λ[email protected] nm

Surface Quality

Better than 20/10 Scratch and Dig

Parallelism

<15 arc seconds

Perpendicularity

<10 arc minutes

Clear Aperture

>95%

Coating

AR/HR/PR coating upon customer’s request

 

 
 
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