YVO4 Crystal


The yttrium vanadate (YVO4) is a positive uniaxial crystal crown 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 is an excellent synthetic substitute for Calcite (CaCO3) and Rutile (TiO22) crystals in many applications including fiber optic isolators, circulators, beam displacers, and other polarizing optics, etc.



Basic Performance for YVO4 Crystals

Transmission Range:

Crystal Cell: a = b = 7.12A , c = 6.29A


Mohs Hardness 5 , like glass
Thermal Expansion Coefficient:
aa = 4.43×10-6/K
aa = 11.37×10-6/K
Thermal Conductivity Coefficient:
up C: 5.23W/m/K
°C C:5.10W/m/K
Thermal Optical Coefficient:
dna/dT = 8.5×10-6/K
dnc/dT = 3.0×10-6/K
Refractive Index, Birefringence
Walk-Off Angle @ 45°(ρ)
no = 1.9929
no = 1.9500
no = 1.9447
ne = 2.2154
ne = 2.1554
ne = 2.2486
ρ = 6.04° @ 0.63µm
ρ = 5.72° @ 1.31µm
ρ = 5.69° @ 1.55µm



Sellmeir Equations for Pure YVO4 Crystal:
no2 = 3.77834 + 0.069736 / (λ2 – 0.04724) – 0.0108133λ2
ne2 = 4.59905 + 0.110534 / (λ2 – 0.04813) – 0.0122676λ2



YVO4 Crystal
Curve for YVO4 and LN, Calcite and a-BBO



Comparision with Other Birefringent Crystals


  • Compared with Calcite, YVO4 has better temperature stability, physical and mechanical properties.
  • Compared with Rutile (TiO2), YVO4 has lower Mohs hardness, it is easy to be manufactured for high surface quality of components, that is base for mass production.
  • Compared with LiNbO3, YVO4 has more than three times birefringence than it, that makes your systems become more compact.


Sinoceramics provides crystal wedges based on a crystal’s birefringent property to control and isolate the back light transmission in fiber. As shown in the figure below, two birefringent wedges are used together with a YIG rotator to construct the core of a fiber optic isolator.





Sinoceramics manufactures (currently mass produces) birefringent wedges for optical fiber communication with. High isolation and low insertion loss can help our customer to produce high quality isolators.