Nd:YVO4 Crystals
 
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 35x50mm3 bulk crystal and f 20x20mm3 finished crystal at a very competitive price.
 

Basic Properties:
 
Atomic Density: 1.26x1020 atoms/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: 90m s
Absorption coefficient: 31.4cm-1 @810nm
Intrinsic loss: 0.02cm-1 @1064nm
Gain bandwidth: 0.96nm @1064nm
Polarized laser emission: p polarization; 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