Applications
An excellent NLO crystal developed mainly for Optical Parametric Oscillation (OPO)
Large non linear coefficients ,broad angular and temperature bandwith.  low dielectric contants, low ionic conductivities .
Lower absorption in the 3-4 ¦Ìm spectrum range than KTP.
Highly resistant to high intensity laser radiation.
1.Physical and Chemical Properties:
|
Crystal Structure |
Orthorhombic,pna21,mm2 |
|
Lattice Parameters |
a=1.312nm,b=0.656nm, c=1.0798nm, |
|
Density |
3.45 g/cm3 |
|
Melting Point |
1130¡À5¡ãC |
|
Ferroeletric transition temperature (¡ãC) |
880 |
|
Ionic conductivity:10kHz s/cm,
room temperature, |
0.7-3.4 x 10^6 |
|
Absorption coefficient @1064nm |
<0.1%/cm |
|
Hygroscopic susceptibility |
No |
|
Dielectric constant: |
¦Å33=42 |
|
Thermal conductivity (mw/cm¡ãC) |
k1=18,k2=19,k3=21 |
2. Optical Properties:
|
Transmitting range: |
0.35-5.3um |
|
Refractive indices(@ 1064 nm): |
nx=1.782 |
|
ny=1.790, |
|
nz=1.868, |
|
Sellmeier equations:
Ni^2=Ai+Bi¦Ë^2/(¦Ë^2-Ci^2)-Di¦Ë^2 |
index |
A |
B |
C |
D |
|
Nx |
1.90713 |
1.23522 |
0.19692 |
0.01025 |
|
Ny |
2.15912 |
1.00099 |
0.21844 |
0.01096 |
|
Nz |
2.14768 |
1.29559 |
0.22719 |
0.01436 |
|
Phase matching range(nm): |
1075-1134nm |
|
Nonlinear Coefficients: (pm/v) |
d15 =2.3 |
|
d24 =3.2 |
|
d31 =2.8 |
|
d32 =4.2 |
|
d33 =16.2 |
|
Electro-optic coefficients
(low frequency, pm/v): |
r13=11.5 |
|
r23=15.4 |
|
r33=37.5 |
|
Damage threshold |
15J/cm^2 at 1064 nm 10 ns pulse |
3. Main Specifications
|
Transmitting wavefront distortion: |
less than l/8 @ 633nm |
|
Dimension tolerance: |
¡À0.1mm |
|
Flatness: |
l/8 @633nm |
|
Surface quality: Scratch/Dig |
10/5 |
|
Parallelism: |
< 30 arc sec. |
|
Perpendicularity: |
< 30 arc min |
|
Angle tolerance: |
¡÷q < 0.5,¡÷q < 0.5¡ã |
|
AR coating: |
AR coatings | |
