Nd:GdVO4 (Neodymium Doped Gadolinium Vanadate)
Nd:GdVO4, is a promising material for diode pumped lasers. Similar to the more well-known Nd:YVO4 crystal, Nd:GdVO4 crystal also exhibits high gain, low threshold, and high absorption coefficients at pumping wavelengths. Nd:GdVO4 has the additional advantage over Nd:YVO4 of a much higher thermal conductivity. For CW lasing at 1.06 um and 1.34 um and intracavity doubling with KTP and LBO, the gadolinium vanadate have produced a higher slope efficiency or optical conversion than Nd:YVO4. |
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Lasertec's Nd:GdVO4 Features
Low lasing threshold and high slope efficiency |
Large stimulated emission cross-section at lasing wavelength |
High absorption over a wide pumping wavelength bandwidth |
Optically uniaxial and large birefringence emitting polarized laser |
Large thermal conductivity, ~ twice of that of Nd:YVO4 |
Structure and Basic Physical Properties
Crystal Structure |
Zircon tetragonal, a=b=7.212, c=6.350 |
Space Group |
Tetragonal I41/amd |
| Melting Point |
1780 degC |
| Thermal Conductivity, <110> |
11.7 W/m/K |
| Thermal Expansion Coefficient (@300K) |
aa=1.5x10-6/K
ac=7.3x10-6/K |
| Specific heat @25oC |
32.6 (cal/mol/K ) |
| Thermo-Optical Coefficient (dn /dT) |
4.7x10-6 /oC |
Density |
5.48 g/cm3 |
| Mohs hardness |
4.6 - 5 |
Optical Properties
Lasing Transition |
4F3/2 - 4I11/2 |
Lasing Wavelength |
1062.9 nm |
Emission Cross Section, (E//c, at 1064 nm) |
7.6x10-19 cm2 |
Absorption Cross Section, (E//c, at 808 nm) |
4.9x10-19 cm2 |
Absorption Linewidth |
3 nm |
Relaxation Time of Terminal Lasing Level |
100 us |
Absorption Coefficient, (E//c, at 808 nm) |
57 cm-1 |
Index of Refraction
Wavelength(nm) |
630 |
850 |
1064 |
1300 |
1550 |
no |
2.01685 |
1.99490 |
1.98535 |
1.97889 |
1.97410 |
ne |
2.25431 |
2.21482 |
2.19813 |
2.18742 |
2.18009 |
Standard Products
Part No |
Doping |
Dimension |
Coating |
GDV01 |
0.5% |
f3 x 60-65mm |
AR/AR Coating |
| GDV02 |
0.5% |
f4 x 60-65mm |
AR/AR Coating |
Other specifications of Nd:GdVO4 crystals and coatings ( e.g. Partial reflection coatings for output coupling ) are available upon request. Please contact Lasertec for details.
Specifications on Finshed Nd:GdVO4
Nd: Dopant Level |
0.5 - 1.0 atm% |
Wavefront Distortion |
< l/8 per 25mm @ 633 nm |
Scattering Sites |
Invisible when probed with a He-Ne laser |
Orientation |
Axis along a- or c- axis ( +/- 0.5 deg.) |
Dimensional Tolerance |
+/- 0.1mm |
End-faces Configuration |
Plano/Plano |
Surface Quality: |
10/5 Scratch/Dig per MIL-O-13830B |
Flatness |
l/10 at 633 nm |
Clear Aperture |
> Central 90% |
Parallelism |
< 10 arc sec. |
Intrinsic Loss |
< 0.1% cm-1 |
Standard coatings
AR/AR:
On the first surface S1: AR@1064(R<0.1%)&532nm(R<0.5%, HT@ 808nm(T>95%);
On the second surface S2: AR@1064&532nm
Hot Applications:
Intracavity doubled ( with LBO) Nd:GdVO4 laser produces 2.4W CW @670nm.
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