Nd:YVO 4
The
Nd:YVO4 crystal is characterized with large stimulated emission
cross-sections at both 1064nm and 1342nm, and higher stimulated emission
cross-section of an a-axis cut Nd:YVO4 crystal at 1064nm, about 4
times higher than that of the Nd:YAG crystal.
Nd:YVO4 is one of the
most efficient laser host crystal for diode laser-pumped solid-state lasers by
means of the following exceptional properties:
Low lasing threshold and high slope
efficiency
Large stimulated emission
cross-section at lasing wavelength
High absorption over a wide pumping
wavelength bandwidth
Optically uniaxial and large
birefringence emits polarized laser
Low dependency on pumping wavelength
and tendency to single mode output
Physical Properties:
|
Atomic Density |
1.26x1020
atoms/cm3 (Nd 1.0%) |
|
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
a=4.43x10-6/K
a
c=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=8.5x
10-6/K
dne/dT=2.9x 10-6/K |
|
Sellmeier Equation (for pure YVO4 crystals) |
no2=3.77834+0.069736/(l2-0.04724)-0.0108133.l2
ne2=4.59905+0.110534/(l2-0.04813)-0.0122676.l2 |
|
Stimulated emission
cross-section |
25x
10-19cm2
@1064nm |
|
Fluorescent lifetime |
90m
s |
|
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%
|
| 
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