Nd:GdVO4

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CRYLINK’s Nd:GdVO4 crystal products, also known as neodymium-doped Gadolinium vanadate crystal. It is a kind of laser crystal product with excellent comprehensive performance. It is widely used in telemetry, ranging, and remote sensing. The product has the characteristics of good thermal conductivity, large excited emission cross-section, and high laser damage threshold. It can be used in laser diode pumped all solid-state (DPSS) microlaser, ladar, remote sensing satellite products.

  • Good thermal conductivity
  • High laser damage threshold
  • Good laser output polarization
  • High laser output slope efficiency
  • Large stimulated emission cross-section
  • Large absorption coefficient, wide absorption bandwidth, little dependence on pump wavelength

Basic Parameters

Crystal StructureZircon Square, Space Group D4h, a=b=7.21, c=6.35
Melting Point1780°C
Density5.47g/cm3
Mohs Hardnessglassy, ~ 5
Thermal Expansion Coefficientaa=1.5×10-6/K, ac=7.3×10-6/K
Thermal Conductivity11.7 W/m/K <110>
Peak Absorption Wavelength808.5 nm
Lasing Wavelength912.6 nm, 1063.1 nm, 1341.3 nm
Crystal正单轴, no=na=nne=nc

no=1.9854, ne=2.1981, @ 1064nm

no=2.038184, ne=2.292962, @ 532nm

no=1.9977322, ne=2.219864, @ 808nm

Thermo-optic Coefficientdn/dT=4.7×10-6/K
Stimulated Emission Cross Section7.60×10-19cm@1064 nm
Fluorescence Lifetime95 ms (1 at% nd doped) @ 808 nm
Loss Factor0.003 cm-1@ 1064 nm
Absorption Coefficient74 cm-1 @ 808 nm (1.2%)
Absorption Length0.32 mm @ 808 nm

Intrinsic LossLess 0.1% cm-1, @1064 nm
Line Width0.6 nm
Plan a Laser LaunchParallel to the Optical Axis(c-axis)
Diode Pumped Optics to Optical Efficiency> 60%

Standard

Orientationa-cut (± 0.55° )
Size Tolerance+/-0.1mm
Wavefront Distortion<λ/8 @632.8nm
Surface Finish20/10
Parallelism< 10 arc seconds
Perpendicularity< 5 arc minutes
Flatness<λ/10 @632.8nm
Clear ApertureCentral 95%
Chamfer0.15×45°
Coating1.AR@1064nm R<0.1%
2.AR@1064nm R< 0.1% & HT@808nm T>95%
3.HR@1064nm R>99.8% & HR@532nm R>99% & HT@808nm T>95%

Spectrum

Nd:GdVO4 laser crystal absorption curve crylink
Nd:GdVO4Absorption Curve

References

[1]Optical and laser properties of Nd:GdVO4 crystal
[2]Passively mode-locked high power Nd:GdVO4 laser with direct in-band pumping at 912 nm
[3]Thermal conductivity and refractive indices of Nd:GdVO4 crystals

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