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Nd:YVO4
- Most efficient laser crystal
- Good physical, optical and mechanical properties
- Lower lasing threshold and higher slope efficiency
- High absorption over a wide pumping wavelength bandwidth
PRODUCT DESCRIPTION
Nd:YVO4 is the most efficient laser crystal for diode-pumped solid-state lasers. Its good physical, optical and mechanical properties make Nd:YVO4 an excellent crystal for high power, stable and cost-effective diode-pumped solid-state lasers. Compared with Nd:YAG for diode laser pumping, Nd:YVO4 lasers possess:
* 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
We provide high quality and large size Nd:YVO4 and pure YVO4 crystal as large as f 35x50mm3bulk crystal and f 20x20mm3finished crystal at a very competitive price.
Basic Properties:
Atomic Density: |
1.26x1020atoms/cm3(Nd 1.0%) |
Crystal Structure: |
Zircon Tetragonal, space group D4h-I4/amd a=b=7.1193 Angstrom, c=6.2892 Angstrom |
Density: |
4.22g/cm3 |
Mohs Hardness: |
4-5 (Glass-like) |
Thermal Expansion Coefficient (300K): |
aa=4.43x10-6/K; ac=11.37x10-6/K |
Thermal Conductivity Coefficient (300K): |
//C: 0.0523W/cm/K;^C: 0.0510W/cm/K |
Optical Properties:
Lasing wavelength: |
1064nm, 1342nm |
Thermal optical coefficient (300K): |
dno/dT=8.5x10-6/K, dne/dT=2.9x10-6/K |
Stimulated emission cross-section: |
25x10-19cm2@1064nm |
Fluorescent lifetime: |
90ms |
Absorption coefficient: |
31.4cm-1@810nm |
Intrinsic loss: |
0.02cm-1@1064nm |
Gain bandwidth: |
0.96nm @1064nm |
Polarized laser emission: |
ppolarization; parallel to optic axis(c-axis) |
Diode pumped optical to optical efficiency: |
>60% |
Laser Properties:
The Nd:YVO4 crystal has large stimulated emission cross-sections 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. Because of its high pump quantum efficiency, the slope efficiency of Nd:YVO4 can be very high if the laser cavity is properly designed.
Nd:YVO4 Specifications:
Transmitting wavefront distortion |
less than l /4 @ 633 nm |
Dimension tolerance |
(W ± 0.1 mm) x (H ± 0.1 mm) x (L + 0.2 mm/-0.1) |
Clear aperture |
> 90% central area |
Flatness |
l /8@633nm, & l /4@633nm for thickness less than 2mm |
Scratch/Dig code |
10/5 to MIL-O-13830A |
Parallelism |
better than 20 arc seconds |
Perpendicularity |
5 arc minutes |
Angle tolerance |
< ± 0.5° |
AR coating |
R< 0.2% at 1064nm, HR coating R>99.8% at 1064nm, T>95% at 808nm |