Nonlinear Crystal KTA Crystals
Potassium Titanyle Arsenate(KTiOAsO4), or KTA crystal, is an excellent nonlinear optical crystal for Optical Parametric Oscillation (OPO) application. It has better non-linear optical and electro-optical coefficients, significantly reduced absorption in the 2.0-5.0 µm region, broad angular and temperature bandwidth, low dielectric constants. And its low ionic conductivities result in higher damage threshold compared with KTP. Crystal length from 0.1-30mm, size up to 15x15x30mm, AR coating from visible to 3300nm
Feature
Large nonlinear and E-O coefficients
Lower absorption in the 3-4μm range than KTP
High damage threshold
Maximum size: 15x15x30mm
AR coating from visible to 3300nm
Application
Excellent for Optical Parametric Oscillation (OPO)
Second Harmonic Generation – SHG@1.083μm-3.789μm
Sum and Difference Frequency Generation (SFG and DFG)
Electro-optical Q-switch and modulation
Specifications:
| Maximum Length |
30mm(Aperture-15x15mm) |
Dimensional Tolerance |
(W+/-0.1mm)x(H+/-0.1mm)x(L+0.2/-0.1mm) |
| Wavefront Distortion |
|
Chamfer |
<0.15mm x 45° |
| Perpendicularity |
< 5 arc min |
Parallelism |
<15 arc sec |
| Flatness |
|
Surface Quality |
10/5 |
| AR Coating |
From visible to 3.3μm |
|
Basic Properties:
| Crystal Structure |
Orthorhombic, point group mm2 |
Lattice Parameter |
a=13.125Å, b=6.5716Å, c=10.786Å |
| Melting Point |
1130℃ |
Mohs Hardness |
Near 5 |
| Density |
3.454g/cm3 |
Thermal Conductivity |
K1:1.8W/m/K; K2: 1.9W/m/K;
K3: 2.1W/m/K |
Optical and Nonlinear Properties:
| Transparency Range |
350-5300nm |
| Absorption Coefficients |
@ 1064nm <0.05 %/cm
@ 1533nm <0.05 %/cm
@ 3475nm <5%/cm |
| NLO susceptibilities(pm/V) |
d31 = 2.76, d32 = 4.74, d33 = 18.5 , d15 = 2.3, d15 = 3.2 |
| |
Index |
A |
B |
C |
D |
Sellmeier Equation
Ni2=Ai+Biλ2/(λ2-Ci2)-Diλ2(λ in μm) |
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 |
Electro-optical constants(pm/V)
(low frequency) |
γ33=37.5;γ23=15.4;γ13=11.5 |
| SHG Phase Matchable Range |
1083-3789nm |