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Yttrium Vanadate ( YVO4)

The yttrium vanadate (YVO4) falls under the category of birefringent crystals and meet all necessary demands to be very prospective material for fibre optical communication systems.
Its ideal for optical polarizing components such as fibre optical isolators, beam displacers and circulators.

Nd3+:YVO4 is one of the most effective and advanced for diode pumped lasers. Compared to Nd3+:YAG and Nd3+:YLF, Nd3+:YVO4 diode pumped lasers have the following advantages:

Wide absorption bandwidth
Low lazing threshold
High slope efficiency
Large luminescent cross-section
Linearly polarized emission and single-mode output

Compactly designed Nd3+:YVO4 lasers with green, red and blue light output are really perfect means for material processing,
spectroscopy, medical diagnostics, laser printing and other applications.
 

Typical Properties of YVO4 crystal

Crystal Structure

Tetragonal: a = b = 7.12 c = 6.29

Density

4.22 g/cm3

Atomic density

~ 1.3x1020atoms/cm2

Mohs hardness

~ 5

Thermal Expansion

a= 4.43 x10-6/ K  ;  c= 11.37 x10-6/K

Thermal Conductivity

C: 5.23 W/m/k  ; ^C axis = 5.10 W/m/k

Nd3+ concentration

0,1 4,0 at.%

Lazing Wavelengths

914 nm, 1064 nm, 1342nm

Axial characteristics

Uniaxial ; n0 = na = nb ; ne = nc

Refractive Indices

o= 1.9573 e= 2.1652 at @ 1064 nm
o= 1.9721 e= 2.1858 at @ 808 nm

o= 2.0210  e= 2.2560at @ 532 nm

Sellmeier Equation (  in m )

o2 = 3.77834 + 0.069736/(2 0.04724) 0.0108133 2
e2 = 4.59905 + 0.110534/(2 0.04813) 0.0122676 2

Thermal Optic Coefficient

da / dt : 8.5x10-6/ oC dc / dt : 3.0 x10-6/ oC

Stimulated emission cross-section

25.0x1019cm2 , @nm

Luminescent lifetime

90mS (50mS for 2 atm%Nd)

Absorption coefficient for 1.1 at.% Nd3+

31.4cm-1 @nm

Intrinsic Loss

0.001cm-1 ; @nm

Gain Bandwidth

0.96nm (257GHz); @nm

Polarized Laser Emission

p polarization ; parallel to optical axis (axis c)

Diode Pumped Optical to Optical Efficiency

 > 60 %


YVO4 LASER LODS

Configuration of rods cross section

 

Round Square

Sizes and processing*

Diameter

mm

1.5 25.0

Length

mm

0.5 30.0

Diameter tolerance

mm

+/- 0.1

Length tolerance

mm

+/- 0.5

Non-parallelism of end faces

 

10

Surface finish

Scratch-dig

10-5

Flatness

 

l/10

 

                     *Sizes and dimensions of elements can be varied according to customers demand