Nd:YVO4
Nd:YVO4
Nd:VO4 is one of the most efficient laser host crystal currently existing for diode laser-pumped solid-state lasers. Its large stimulated emission cross-section at lasing wavelength, high absorption coefficient and wide absorption bandwidth at pump wavelength, high laser induced damage threshold as well as good physical, optical and mechanical properties make Nd:YVO4 an excellent crystal for high power, stable and cost-effective diode pumped solid-state lasers. Recent developments have shown that Nd:YVO4 can produce powerful and stable IR, green, blue lasers with the design of Nd:YVO4 and frequency doubling crystals.
Standard Specification:
Nd: Dopant Level 0.1 - 3.0 atm%
Wavefront Distortion < λ/8 @ 633 nm
Scattering Sites invisible, probed with a He-Ne laser
Orientation ±0.5deg.
Dimensional Tolerance ±0.1mm
End-faces Configuration Plano/Plano
Surface quality 10/5 Scratch/Dig per MIL-O-13830B
Flatness λ/8 @ 633 nm
Clear Aperture > Central 90%
Parallelism < 10 arc sec.
Intrinsic Loss < 0.1% cm-1
Advantages:
◆ Lower lasing threshold and higher slope efficiency
◆ Large stimulated emission cross-section at lasing wavelength
◆ High absorption over a wide pumping wavelength bandwidth
◆ Low dependency on pumping wavelength and tend to single mode output
◆ Optically uniaxial and large birefringence emit strongly-polarized laser
For the applications in which more compact design and the single-longitudinal-mode output are needed, Nd:YVO4 shows its particular advantages over other commonly used laser crystals. The diode laser-pumped Nd:YVO4 compact laser and its frequency-doubled green, red or blue laser will be the ideal laser tools of machining, material processing, spectroscopy, wafer inspection, light show, medical diagnostics, laser printing and the most widespread applications.
Newphotons massively produces and provides high quality Nd:YVO4 crystals at competitive prices.
AR/AR:S1:AR@1064(R<0.1%)&532nm(R<0.5%)HT@808nm(R<5%);S2:AR@1064&532nm
HR/AR:S1:HR@1064(R>99.8%)&532nm(R>99%)HT@808nm(R<5%);S2:AR@1064&532nm
Note: Other specifications of Nd:YVO4 crystals and coatings are also available upon request.
Basic Properties:
Atomic Density: | 1.26x1020 atoms/cm3 (Nd1.0%) |
Crystal Structure: | Zircon Tetragonal, space group D4h-I4/amd |
Density: | 4.22g/cm3 |
Mohs Hardness: | 4-5(Glass-like) |
Thermal Expansion Coefficient(300K): | αa=4.43x10-6/K |
Thermal Conductivity Coefficient(300K): | //C:0.0523W/cm/K |
Optical Properties:
Lasing wavelength: | 1064nm,1342nm |
Thermal optical coefficient (300K): | dno/dT=8.5×10-6/K |
Stimulated emission cross-section: | 25×10-19cm2 @ 1064nm |
Fluorescent lifetime: | 90μs(1% Nd doping) |
Absorption coefficient: | 31.4cm-1 @810nm |
Intrinsic loss: | 0.02cm-1 @1064nm |
Gain bandwidth: | 0.96nm@1064nm |
Polarized laser emission: | π polarization; parallel to optic axis(c-axis) |
Diode pumped optical to optical efficiency: | >60% |
Sellemeier equations (λ in um) | n02=3.77834+0.069736/(λ2-0.04724)-0.010813λ2 ne2=4.59905+0.110534/(λ2-0.04813)-0.012676λ2 |
Laser properties:
The Nd:YVO4 crystals has large stimulated emission cross-section at both 1064nm and 1342nm. The stimulated emission cross-section of an a-axis cut Nd:YVO4 crystal at 1064nm is about 4 times higher than that of the Nd:YAG crystal. Although the lifetime of Nd:YVO4 is about 2.7 times shorter than that of Nd:YAG crystal. Because of its high pump quantum efficiency, the slope efficiency of Nd:YVO4 can be very high if the laser cavity is properly designed. Table1 lists the major laser properties of Nd:YVO4 in comparision with those of Nd:YAG.
Table1. Laser Properties of Nd:YVO4
LASER CRYSTAL | DOPING(atm%) | σ | α | τ | Lα | Pth | ηs |
Nd:YVO4(a-cut) | 1.0 | 25 | 31.2 | 90 | 0.32 | 30 | 52 |
Nd:YVO4(c-cut) | 1.1 | 7 | 9.2 | 90 | 231 | 45.5 | |
Nd:YAG | 0.85 | 6 | 7.1 | 230 | 1.41 | 115 | 38.6 |
Diode pumped Nd:YVO4 laser output comparing with diode pumped Nd:YAG laser
Crystals | Size(mm3) | Pump Power | Output (at 1064nm) |
Nd:YVO4 | 3x3x1 | 850mW | 350mW |
Nd:YVO4 | 3x3x5 | 15W | 6W |
Nd:YAG | 3x3x2 | 850mW | 34mW |