Neodymium doped gadolinium orthovanadate (Nd:GdVO4) crystal is a diode-pumped solid-state (DPSS) laser material with good physical, optical, and mechanical properties, exhibiting high gain, low threshold, and high absorption coefficient at the pump wavelength. In comparison to Nd:YAG crystals, Nd:GdVO4 crystals have greater thermal conductivity, higher slope efficiency, and higher power output. Nd:GdVO4 has a greater slope efficiency or optical conversion than Nd:YVO4 for 1.06 um and 1.34 um CW lasers, as well as intracavity multiplication of KTP and LBO.
Alfa Chemistry is a leader in online customization for Nd:GdVO4 laser crystals, and we will gently and thoroughly walk our customers through the procedure. We use the Czochralski process to create Nd:GdVO4 crystals, and then we analyze their absorbance, fluorescence, thermal expansion, and specific heat at room temperature.
Advantages of Nd:GdVO4 Crystals
Nd:GdVO4 crystals have a high laser-induced damage threshold, low laser threshold and high slope efficiency, and strong polarization laser output. Nd:GdVO4 crystals have a large bandwidth, a high pump wavelength absorption coefficient, and little reliance on the pump wavelength. In comparison to Nd:YAG, it has a bigger excited emission cross section at 1064 nm and a higher absorption coefficient at 808 nm. In comparison to Nd:YVO4, it also has superior thermal conductivity.
Fig 1. Absorption spectra of the Nd:GdVO4 crystal (concentration of neodymium ions is 1 at%) for p-and s-polarised radiations, and the absorption spectrum of the Nd:YAG crystal. (Garnov S, et al. 2008)
Properties of Nd:GdVO4 Crystals
| Physical Properties | |
|---|---|
| Crystal Structure | Tetragonal, I41/amd |
| Lattice Parameter | a=0.721 Å, b=0.635 Å |
| Thermal Expansion | (@250C) 1.7x10-6/℃, 7.3x10-6/℃ |
| Melting Point | 1780 ℃ |
| Specific Heat | 32.6 cal/mol·K (@250C) |
| dn/dT | 4.7x10-6/℃ |
| Optical Properties | |
| Laser Wavelengths | 1062.9 nm,1340 nm |
| Effective Laser Cross Section | 7.6 x 10-19cm2 (emission cross section at 1064 nm) |
| Polarization | Parallel to c-axis |
| Radioactive Lifetime | ~ 95 µs at 1% Nd doping |
| Thermal Conductivity | 11.7 W/m/K |
| Pump Wavelength | 808.4 nm |
| Peak Pump Absorption | ~ 57 cm-1 at 1% doping |
| Alfa Chemistry offers Nd:GdVO4 specification | |
| Dimension | Upon customer request |
| Dimension Tolerance | ±0.1 mm |
| Doping(atm%) | 0.1% ~ 3% |
| Doping Concentration Tolerance | ±0.05%(atm%<1%), ±0.1%(atm%≥1%) |
| Orientation | A-cut/C-cut +/-0.5deg |
| Flatness | λ/10 @ 632.8nm |
| Surface Quality | 10/5 per MIL-O-13830B |
| Clear Aperture | > 95% |
| Damage Threshold | 750MW/cm2 at 1064nm, TEM00, 10ns, 10Hz |
| Coating | AR/HR/PR (IAD, EB, IBS) coating upon customer's request |
| Quality Warranty Period | One year under proper use |
Why Choose Alfa Chemistry?
Alfa Chemistry customizes cutting-edge Nd:GdVO4 laser crystals for its customers. The size is tailored to the customer's requirements. As a professional laser crystal supplier, we directly and indirectly supply over 70% of these laser master crystals to our end users with high quality and very low prices. We have received positive feedback from our customers all over the world.
If you need technical advice, please contact our technical team to learn more about our high-quality services.
Reference
- Garnov S, et al. (2008). "Study of The Possibility of Developing A Multichannel-Diode-Pumped Multikilowatt Solid-State Laser Based on Optically Dense Active Media." Quantum Electronics. 37(10): 910.