Nd:YVO4 Crystal

Basic Properties:

Atomic Density: 1.26x1020 atoms/cm3 (Nd 1.0%)
Crystal Structure: Zircon Tetragonal, space group D4h-I4/amd
                  a=b=7.1193, c=6.2892
Density:          4.22g/cm3
Mohs Hardness: 4-5 (Glass-like)
Thermal Expansion Coefficient (300K):a=4.43x10-6/K
                c=11.37x10-6/K
Thermal Conductivity Coefficient (300K)://C: 0.0523W/cm/K
                C: 0.0510W/cm/

 Standard specifications
Nd: Dopant Level 0.1 - 3.0 atm%
Standard Dimensions 4x4x8mm,3x3x5mm3, 3x3x3 mm3, 3x3x1 mm3
Wavefront Distortion < l/8 at 633 nm
Scattering Sites invisible, probed with a He-Ne laser
Orientation +/-0.5deg.
Dimensional Tolerance -1
End-faces Configuration Plano/Plano
Surface quality 10/5 Scratch/Dig per MIL-O-13830B
Flatness l/10 at 633 nm
Clear Aperture > Central 90%
Parallelism < 10 arc sec.
Intrinsic Loss < 0.1% cm-1

Other Specifications are available according to requirements.



1. Diode Laser-Pumped Nd:YVO4 Lasers

  • A threshold of 78 mW and a slope efficiency of 48.5% at 1.064 mm were obtained by using an a-cut 3 mm long Nd:YVO4 crystal with output coupler R = 96%. Under the same conditions, a 5 mm long Nd:YAG crystal has a threshold of 115 mW and a slope efficiency of 38.6%.
  • Recently, over 30 W of TEM00 output power was achieved by using a-cut Nd:YVO4 and pumped by 60 W fiber coupled diode lasers. The optical conversion efficiency exceeds 50%. High power and stable infrared output @ 1064 nm and 1342 nm has been available with diode pumped Nd:YVO4 lasers.
  • Single-longitudinal-mode oscillation of a Nd:YVO4 microchip laser has been achieved with high power and high slope efficiency. Such a single mode source has been developed for the use of a master oscillator for injection locking of Nd laser systems.
  • Because of its large stimulated emission cross section at 1.34 mm, Nd:YVO4 is also an efficient laser crystal for diode laser-pumped 1.3 mm laser. By using 1 mm long Nd:YVO4 crystal and pumped by an 850 mW diode laser at 808 nm, 50 mW output at 1.34 mm has been observed, compared to 34 mW from 2 mm long Nd:YAG.

2. Frequency-doubled Nd:YVO4 Lasers

  • By using the compact design of Nd:YVO4 + KTP crystals, high power green or red light output can be generated in a diode laser pumped Nd:YVO4 laser. When pumped by a 890 mW diode laser, more than 76 mW single mode (TEM00) green output was obtained with a 3x3x1 mm3 Nd:YVO4 and a 3x3x5 mm3 intracavity KTP.
  • Diode pumped green lasers has been commercialized with the compact design of Nd:YVO4 + KTP crystals. 2.5 mW green output was achieved in a Nd:YVO4 microchip laser with a very short (9 mm) laser cavity when pumped by a 50 mW diode laser.
  • Over 10 W and high stable CW green output @ 532 nm was commercially available with diode pumped Nd:YVO4 and frequency doubling with a NCPM LBO crystal. Single longitudinal mode (SLM) green output, Q-switched green and UV outputs were also obtained.
  • Over 400 mW blue laser @ 457 nm based on Nd:YVO4+ BBO crystals is commerical available .

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