Shown excellent
in efficiency, physical, optical and mechanical properties,
Nd:YVO4 crystal is widely
applied as laser material to diode-pumped solid-state (DPSS)
lasers to yield stableand powerful red, green and infrared
laser. In comparison with Nd:YAG material for diode-pumping
applications. Nd:YVO4
lasers have the following features:
• lower lasing threshold and higher slope effciency;
• large stimulated emission cross-section at lasing wavelength;
• high absorption over a wide pumping wavelength bandwidth;
• low dependency on pumping wavelength and easier to yield
single mode output.
OSICO manufactures and provides customers with different kinds
of dopants and different doping levels of Nd:YVO4
crystals on a competitive pricing basis.
Basic Properties
Atomic Density
1.26x1020 atoms/cm3
(Nd 1.0%)
Crystal Structure
zircon tetragonal, space group D4h-I4/amd
a=b=7.1193
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
¡Í 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
p polarization;
parallel to optic axis(c-axis)
Diode pumped optical to optical
efficiency
>60%
Sellmeier
equations (for pure YVO4
crystals)( ¦Ë in mm )
Transmitting wavefront distortion: less than ¦Ë /4 @ 633
nm
Dimension tolerance: (W ± 0.1mm)x(H ± 0.1mm)x(L
±0.1mm)
Clear aperture: > 90% central area
Flatness: ¦Ë /8@ 633 nm, and ¦Ë /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 minutesAngle tolerance: < ±
0.5o
AR coating: R< 0.2% at 1064nm
HR coating: R>99.8% at 1064nm, T>95% at 808nm
