Undoped Yttrium Orthovanadate

 Single Crystal(YVO4)

   Undoped YVO4 is an excellent birefringence optical crystal developed newly. It has very good transmission in a wide wavelength range from visible to infrared, large index of refractivity and birefringence difference. Compared with other important birefringence crystals, YVO4 has higher hardness, better fabrication property, water insoluble and man-made than calcite (CaCO3 single crystal); easier to get large, high quality crystal and lower cost than rutile (TiO2 single crystal). Those outstanding properties make YVO4 very important birefringence optical material and widely used in opto-electronic research, development and industry. For example, the optical communication system needs a huge quantity devices of undoped YVO4, such as fible optical isolators, circulators, beam displacers, Glan polarizers and other polarizing devices.

Specifications:

Crystal Structure

Zirconium Tetragonal

Space Group

D4h

Lattice Constant

a=b=7.12Å,c=6.29Å

Crystal Class

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

Atomic Density

~1.37x1020atoms/cm3

Growth Methode

czokralski

Melting Point

1825oC

Density

4.22g/cm3

Mohs hardness

~5(like glass)

Thermal Expansion

aa=4.43x10-6/K         ac=11.37x10-6/K

Thermal Conductivity

∥C: 0.0523W.cm/K         ⊥C: 0.0510W.cm/K

Transmission Range

0.45~5µm

Sellmeier Equation

（λ：µm）

no2 =3.77843+0.069736/(λ2-0.04724)-0.0108133λ2

ne2 =4.55905+0.110534/(λ2 -0.04813)-0.0122676λ2

   n   \ Wavelength

0.63µm

1.30µm

1.55µm

Index of refractivity no

1.9929

1.9500

1.9447

Index of refractivity ne

2.22154

2.1554

2.1486

Birefringency Differency(△n=ne-no)

0.2225

0.2054

0.2039

Optical axis 45 º

6.04 º

5.72 º

5.69 º

Thermal Optical Coefficient

dna/dt=8.5x10-6/K,   dnc/dt=3.0x10-6/K

Customer design for birefringence devices are available--design, fabrication and coating.

Tel: 86-10-82649287      Fax: 86-10-82649467
E-mail: sales@aphy.iphy.ac.cn