|
 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: |
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% |
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
|
 Nd:YAG rod
Nd:YVO4
KTA
(Nd, Ce):YAG
Yb:YAG
Cr4+:YAG
KTP
LBO
BBO |
