Photox Optical Systems
YVO4 crystal YVO4 YVO4 crystal YVO4 YVO4 crystal YVO4

Photox YVO4 Crystal

Yttrium orthovanadate (YVO4) is a positive uniaxial crystal grown with the Czochralski method. It is ideal for optical components such as fiber optical isolators and circulators, beam displacers and other polarizing optics, etc.

Basic Properties of YVO4 crystals:

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

Mohs Hardness:

5, glass-like

Deliquescence

None

Thermal Expansion Coefficient:

 aa = 4.43 x 10-6/K; a c = 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

Thermal Optical Coefficient:

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

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

no = 1.9929, ne = 2.2154, D n = 0.2225, r = 6.04o at 0.63 m m
no = 1.9500, ne = 2.1554, D n = 0.2054, r = 5.72o at 1.30 m m
no = 1.9447, ne = 2.1486, D n = 0.2039, r = 5.69o at 1.55 m m
Sellmeier Equation (l in m m): no2 = 3.77834 + 0.069736/(l 2 - 0.04724) - 0.0108133 l 2
ne2 = 4.59905 + 0.110534/(l 2- 0.04813) - 0.0122676l 2

High quality YVO4 crystals with different dimensions are available at low cost. We can provide large quantities (about 10,000pcs/month) of YVO4 wedges and YVO4 displacers used in fiber optical Isolator and Circulator.

Applications of YVO4 Crystals:

Birefringent Wedges for Fiber-Optic Isolators

Specifications:
Aperture 1.0 x 1.0 mm2 to 4 x 4 mm2 Wedge 1.GIF (51596 bytes)
Dimension tolerance +/-0.05mm
Wedge Angle tolerance +/-0.1o
Optical axis orientation +/-0.5o
Flatness l/4 @632.8 nm
Surface Quality 20-10
AR-coating R<0.2% @1550 or 1310nm
Standard Size 1.25mmx1.25mmx0.5mm with
8o or 9o wedge, phi=22.5o

Note: Other sizes and specifications are available upon request.

YVO4 Beam Displacer for circulator

Specifications:

Dimension tolerance +/-0.05mm x +/-0.05mm x +/-0.1mm
Optical axis orientation +/-0.5o
Parallelism <15 arc sec
Perpendicularity <10 arc min
Flatness l /4 @ 632.8 nm
Surface Quality 20-10
AR-coating R<0.2% @ 1550 nm or 1310nm +/- 40 nm
Standard Size 2.6x2.6x10mm, q =45o , f =0o

Note: Other sizes and specifications are available upon request.