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.
Large stimulated emission cross-section at the laser wavelength
High absorption coefficient and wide bandwidth at the pump wavelength
Low dependency on pump wavelength
Good thermal conductivity
Low lasing threshold and high slope efficiency
High laser-induced damage threshold
Strongly-polarized laser output.
DPSS
Laser industry machining
Laser ranging
Medical examination
Doping | 0.1%~3% |
Doping concentration tolerance | ±0.05%(atm%<1%),±0.1%(atm%≥1%) |
Orientation | A-cut/C-cut +/-0.5deg. |
Dimension Tolerance | ±0.1mm |
Flatness | λ/10 @ 632.8nm |
Wavefront distortion | λ/6@ 632.8nm |
Surface Quality | 10/5 per MIL-O-13830B |
Parallelism | 10″ |
Perpendicularity | 10′ |
Bevel/Chamfer | <0.1mm@45deg. |
Chips | <0.1mm |
Clear Aperture | >95% |
Coating | AR/HR/PR (IAD, EB, IBS) coating upon customer’s request |
Damage Threshold | 750MW/CM2 at 1064nm, TEM00, 10ns, 10Hz |
Quality Warranty Period | One year under proper use |
Crystal | Nd: GdVO4 | Nd: YVO4 | ||
Crystal Structure, Space Group | Tetragonal, I41/amd | Tetragonal, I41/amd | ||
Lattice constants (nm) | a:0.721 b:0.635 | a:0.721 b:0.629 | ||
Melting temperature(℃) | 1780 | 1825 | ||
Thermal expansion @25℃, x10^-6/℃ | a | 1.7 | a | 4.43 |
b | 7.3 | b | 11.4 | |
Specific heat @25℃, cal/mol·K | 32.6 | 24.6 | ||
dn/dT, x10^-6/℃ | 4.7 | 2.7 | ||
Crystal | Nd: YVO4 | Nd: GdVO4 | Nd: YAG |
Laser wavelengths | 1064.3nm,1342.0 nm | 1062.9 nm,1340 nm | 1064.2 nm,1338.2 nm |
Emission bandwidth (linewidth at 1064 nm) | 0.8nm | No data | 0.45nm |
Effectivelasercross section(emission cross section at 1064 nm) | 15.6 x 10^-19 cm2 | 7.6 x 10^-19cm2 | 6.5 x 10^-19cm2 |
Polarization | Parallel to c-axis | Parallel to c-axis | unpolarized |
Radioactive lifetime (microseconds) at 1% Nd doping | ~ 100 µs | ~ 95 µs | 230 µs |
Pump wavelength | 808.5 nm | 808.4 nm | 807.5 nm |
Thermal conductivity, W/m/K | 5.1 | 11.7 | 14 |
Peak pump absorption at 1% doping | ~ 41 cm-1 | ~ 57 cm-1 |
