|
|
|
KTA Crystal
Crystals >>>
KTA Crystal
Potassium Titanyle Arsenate(KTiOAsO4),
or KTA crystal, is an
excellent nonlinear optical crystal for Optical Parametric Oscillation (OPO)
Application. OPO devices based on KTAs are reliable, solid state sources
of tunable laser radiation exhibiting energy conversion efficiencies above
50%. In addition KTA has a very high damage threshold.
In comparison to KTP, KTA
crystals feature large non-linear optical and electro-optical coefficients and
have significantly reduced absorption in the 2.0 - 5.0 mm
range. Its low dielectric constants, low loss tangent and ionic
conductivities are orders of magnitude less than that of KTP.
Advantage:
-
Large nonlinear optical and
electro-optical coefficients
-
Wide angular bandwidth and small walk-off
angle
-
Broad temperature and spectral bandwidth
-
Low dielectric constants, loss tangent and ionic
conductivities (much less than that of KTP)
-
High damage threshold
Application:
-
Frequency Doubling (Second
Harmonic Generation SHG)
-
Sum and Difference
Frequency Generation (SFG)/(DFG)
-
Optical Parametric
Oscillation (OPO)
-
Electro-Optical Q-switch
and modulation for Optical waveguides
Main Specification:
| |
Standard |
Precision |
| Diameter
Tolerance |
±0.1mm |
| Length
Tolerance |
+0.3mm/-0.2mm |
| Parallelism |
<30" |
<5" |
| Perpendicularity |
<30' |
<5' |
| Flatness |
l/10@633nm |
l/20@633nm |
| Roughness |
<10Å
Rms |
| Orientation(q
, f ) |
± 0.5° |
± 0.1° |
Physical and Chemical Properties:
| Formulation |
KTiOAsO4 |
| Crystal structure |
Orthorhombic |
| Lattice parameters |
a=13.125Å
b=6.5716Å c=10.786 Å |
| Point group |
mm2 |
| Hardness (Mohs) |
near 5 |
| Hygroscopic susceptibility |
none |
| Chemically |
stable |
| Density |
3.454 g/cm3 |
Thermal conductivity
(mW/cm/°C) |
|
| Ionic conductivity (room temperature, 10kHz) |
0.7 - 3.4.10-6 S/cm |
Optical and NLO Properties:
| Transparency range |
0.35 - 5.3 µm |
| Average refractive index |
1.8 |
| Absorption |
@ 1064 nm <0.05 %/cm
@ 1533 nm <0.05 %/ cm
@ 3475 nm <5%/cm |
| NCPM Angle |
|
| Wavelength |
| Pump |
Signal |
Idler |
| 1064 nm |
1533 nm |
3475 nm |
|
Electro-optical constants
(low frequency) |
| r33 |
r23 |
r13 |
| 37.5 pm/V |
15.4 pm/V |
11.5 pm/V |
|
|
|
|
|