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Nd3+:GdVO4, Nd, Er or Yb doped YVO4 , Combined YVO4/Nd3+:YVO4
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yttrium vanadate YVO4:Nd
yttrium vanadate YVO4:Nd
Nd doped Yttrium Vanadate (Nd3+:YVO4) is one of the most effective and advanced materials for diode pumped lasers. 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. Compared to Nd3+:YAG and Nd3+:YLF, Nd3+:YVO4 diode pumped lasers have: wide absorption bandwidth, low lasing threshold, high slope efficiency, large luminescent cross-section, linearly polarized emission and single-mode output.
   Yttrium Vanadate doped with Er3+ or Yb3+ and also with a combination of Er3+, Yb3+ (YVO4:Er3+; YVO4:Yb3+; YVO4:Er3+,Yb3+) work on wavelenghts of 1.54, 1.61 µm and are used in eyesafe laser applications. In contrast to Er3+, Yb3+ doped phosphate glass, Er3+, Yb3+:YVO4 crystals can be used in CW mode with high pump energy and high efficiency. Its thermal conductivity is much higher than that of glass and this improves pump characteristics of the laser and relaxes cooling requirements. Yb3+:YVO4 has a wide absorption bandwidth at 0.98 µm and can generate with high effectivity at 1.02 µm, due to low losses of the pump energy.
  Combined Yttrium Vanadate (YVO4 /Nd3+:YVO4) crystals, which had combined during growth process, are principially different from analoguous composite crystals, produced by bonding undoped and Nd3+ doped YVO4 crystals utilizing the thermal diffusion. In case of thermal diffusion at the bonding interface, optical losses can be examined, which lead to lower laser efficiency, and at certain laser conditions cracks can appear on this interfaces resulting in the damage of the optical element. The offered combined crystals do not have such bonding interfaces and for this reason mentioned problems do not occur. The combined crystals have about 10-15% higher output generation characteristics and a higher damage threshold compared to composite crystals.
   New Nd3+-doped gadolinium vanadate crystals Nd3+:GdVO4 allow to create effective diode-pumped lasers for applications in medicine and technique.
MAIN PROPERTIES OF Nd3+:YVO4:
Syngony cubic
Spatial group Fd3m
Lattice constant, Å a = b = 7.12, c= 6.29
Density, g/cm3 4.22
Mohs hardness 8 - 9
Melting point, C 2105
Crystal structure tetragonal
Refractive indices:  
  at 1064 nm no =1.9573; ne =2.1652
  at 808 nm no =1.9721; ne =2.1858
  at 532 nm no =2.0210; ne =2.2560
Thermal expansion coefficient αc = 11.37 x 10-6 x K-1
Thermal conductivity at 25C, W x m-1 x K-1, perpendicular to c-axis 5.10
Lasing Wavelengths, nm 914, 1064, 1342

MAIN PROPERTIES OF Nd3+:GdVO4:
Generation transitions 4F3/2(P)4I13/2 4F3/2(P)4I11/2
Generation wavelength, nm 1062.9; 1340
Absorption coefficient, cm-1E׀׀C; E C 74 at 808nm; 10 at 808nm
Wavelength range for diode pumping, nm 805-815
Lattice parameters, Å a=b=7.21; c=6.35
Density, g/cm3 5.47
Thermal conductivity, W/(mK); 11.7 (011); 9.6 (100)

Specifications for laser rods/slabs:
Material: YVO4:Nd3+ YVO4:Er3+ YVO4:Yb3+ YVO4 /Nd3+:YVO4 Nd3+:GdVO4
Dopant concentration, at. % 0.1 - 4.0 0.2 - 5.0 0.5 - 5.0 0.1 - 2.0 0.1 - 4
Configuration of rods cross section round or square round or square round or square round or square round or square
Cross section, mm 1.5 - 25.0 from 2x2 to 5x10 from 2x2 to 5x10 from 2x2 to 5x10 from 2x2 to 5x10
Length, mm 0.5 - 30.0 0.5 - 20 0.5 - 20 undoped part - 1-5
doped part - 1 - 10
0.5 - 20
Diameter tolerance, mm ± 0.1 ± 0.1 ± 0.1 ± 0.1 ± 0.1
Length tolerance, mm ± 0.5 ± 0.1 ± 0.1 ± 0.1 ± 0.1
Non-parallelism of end faces, arc sec 10 10 10 10 10
Surface finish, Scratch-Dig 10 - 5 10 - 5 10 - 5 10 - 5 10 - 5
Flatness λ/10 λ/10 λ/10 λ/10 λ/10

We supply rods and slabs with different cross-sections, dimensions and coatings. Different dopants compositions with different concentrations are available for specific customer requirements.

I N Q U I R Y    F O R M :

Material:
Quantity of elements:
Application:

For example: SHG@1064; SFG@800+267->200; DFG@780-842->10600; OPO@355->460÷560+960÷1150; etc.
polished sites:

BLOCK    or  BLOCK
 a-b b-c a-c
or d  
Dopant conc.:
% ;      Orientation:
Dimensions/Tolerances:
For example:
10.0 +/- 0.1
Coating:

For example: ARC s1/s2 1064 R<0.25%; ARC s1/s2 1064 R<0.25%+532<0.5%;
BBAR s1/s2 1064 R<1%+3÷10<5% etc.
a = mm;
c = mm
b = mm or
dia. = mm;
This field is for additional information such as application,
comments, add. requirements etc.

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