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YVO4 Crystal

YVO4 Crystal

 (Yttrium Vanadate )
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, interleavers, beam displacers and other polarizing optics(refer to table 1).

YVO4 Crystal
YVO4 Crystal

 Table 1.Comparison of basic properties betweenYVO4 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
 
 

 Nd:YVO4 specifications

Dimension Tolerance
±0.1mm
Flatness
λ/10 @ 632.8nm
Wavefront distortion
λ/10@ 632.8nm
Surface Quality
10/5  per MIL-O-13830B
Parallelism
10″
Perpendicularity
10′
Bevel/Chamfer
<0.1mm@45deg.
Chips
<0.1mm
Clear Aperture
>95%
Coating
AR/HR/PR coating upon customer’s request
Damage Threshold
  750MW/CM2 at 1064nm, TEM00, 10ns, 10Hz
Quality Warranty Period
   One year under proper use