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Nd:YVO4 Crystal |
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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/
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Standard specifications |
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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.
Application:
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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Copyright ©2023
Chang Chun Fortune Optronics Inc. All rights reserved |
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