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Yttrium Orthovanadate (YVO4) > YVO4

Introduction

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 also has good physical and favorable mechanical properties than other birefringent other crystals which make it well suited for compact fiber optical components such as isolators circulators and interleavers etc.
 
 

Standard Specifications

  

Basic Properties

 

Items

Specification

Transparency Range

high transmittance from 0.4 to 5mm

Crystal Symmetry

Zircon Tetragonal, space group D4h

Crystal Cell

a=b=7.12 Å, c=6.29 Å

Density

4.22 g/cm3

Hygroscopic Susceptibility

Non-hygroscopic

Thermal Expansion Coefficient

aa = 4.43 x 10-6/K; ac = 11.37 x 10-6/K

Thermal Conductivity Coefficient

∥C: 5.23 W/m/K; ⊥ C: 5.10 W/m/K

Crystal Class

Positive uniaxial with no=na=nb, ne=nc

Refractive Indices, Birefringence (Dn = ne - no) and Walk-off Angle at 45º (r)

no = 1. 9929, ne = 2.2154, Dn = 0.2225, r = 6.04     at 0.63 mm
no = 1.9500, ne = 2.1554, Dn = 0.2054, r = 5.72     at 1.30 mm
no = 1.9447, ne = 2.1486, Dn = 0.2039, r = 5.69     at 1.55 mm

Sellmeier Equation

(l in mm)

no2= 3.77834 + 0.069736/(l2 - 0.04724) - 0.0108133l2
ne2=4.59905 + 0.110534/(l2 - 0.04813) - 0.0122676l2

Thermal Optical Coefficient

dna/dT = 8.5x10-6/K; dnc/dT = 3.0x10-6/K

  
   
 

Items

Specification

Dimension Tolerance

±0.05mm

Flatness

≤λ/ 4 @ 633nm

Wavefront distortion

≤λ/ 4 @ 633nm

Surface Quality

Scratch and Dig 20-10

Beam Deviation

< 3 arc minutes

Clear Aperture

> 80%

Coating

Upon the customers’ request

 

  
Catalogue Download
YVO4
YVO4
 

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