Nd:YVO4 - Neodymium Doped Yttrium Orthvanadate
Nd:YVO4
is one of the most efficient laser host crystal currently existing for
diode-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 DPSS laser. 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.
Compared with Nd:YAG and Nd:YLF for diode laser pumping, Nd:YVO4 lasers posses the advantages of lower dependency on pump wavelength and temperture control of a diode laser, wide absorption band, higher slope efficiency, lower lasing threshold, linearly polarized emision and single-mode output. For the applications in which more compact design and the single frequency output are desired, Nd:YVO4 shows its particular advantages over other commonly used laser crystals. The diode-pumped Nd:YVO4 compact laser and its frequency-doubled green, red or blue laser light will be the ideal laser tools of mechining, material processing, spectroscopy, wafer inspection, light show, medical diagnostics, laser printing and the most widespread applications.
Physical and Optical Properties:
Crystal Structure: Zircon Tetragonal, space group D4h, a=b=7.12, c=6.29
Melting point: 1825deg.C
Hardness: Glass-like, Mohs 5
Density: 4.22 g/cm 3
Thermal Conductivity: //c: 5.23 W/m.K; ⊥c: 5.10 W/m .K Thermal Expansion:
aa=4.43x10^-6/K, ac=11.37x10^-6/K
Optical Properties:
Lasing Wavelength: 914nm, 1064nm, 1342nm
Fluorescent lifetime: 90us (1.1% doping), 50 us ( 2.0% doping)
Stimulated emission cross section: 25.0 x 10^-19/cm 2 @1064nm
Refractive Index: no=1.9573, ne=2.1652 @1064nm
no=1.9721, ne=2.1858 @808nm
no=2.0210, ne=2.2560 @532nm
Thermal Optical Coefficient: dna/dT=8.5x10^-6/K dnc/dT=3.0x10^-6/K
Absorption Coeffient: 31.4/cm @808nm 1.1% dooing
Polarized Laser Emission: π polariztion; //c
General Specifications:
Nd dopant concentration: 0.2 ~ 3 atm% (tolerance with 10%)
Dimension Tolerance: +0/-0.1mm
Surface Quality: 10-5 Scratch-dig
Surface Flatness: <110 @633nm
Chamfer: 0.1mm@45deg.
Clear Aperture: Central 90% of Diameter
Paralallism: <10 arc seconds
Perpendicular: <10 arc minutes
Orentation Angle: +/-0.5deg.
Damage threshold: >15J/cm2 (without coating) or >700 MW/cm2 (coating)
Coating:
AR Coating R< 0.1%@ 1064nm & HT @ 808nm T>95%
HR Coating R>99.8%@ 1064nm & HT@ 808nm T>95%
Diffusion Bonded Nd:YYVO4 / YVO4 crystals are available
in OptoCity. These Diffusion Bonded Crystals are combined by optical contact
method and further bonded under high temperature. Diffusion Bonded Crystal
helps to decrease thermal lensing effect considerably.
Nd:YVO4 cemented with other crystal, such as KTP or Cr:YAG is also available. Please Contact our sales for more information.
