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KTA(Potassium Titanyle Arsenate, KTiOAsO4) 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 .
Bluebean Optical offers KTA:
- Crystal length from 0.1mm to 30mm and aperture up to 15x15mm
- AR-coating for VIS-IR and mid IR ranges
- Re-polishing and re-coating service
- Standard and customized mounts and housings
KTA Standard Product Specifications:
|
Flatness |
λ/8@633 nm |
|
Parallelism |
20 arc sec |
|
Surface quality |
10/5 Scratch/Dig (MIL-PRF-13830B) |
|
Perpendicularity |
15 arc min |
|
Angle tolerance |
< ± 0.2° |
|
Aperture tolerance: |
±0.1 mm |
|
Clear aperture |
>90% central area |
|
Transmitting wavefront distortion |
λ/8@633 nm |
KTA Physical Properties:
|
Crystal structure |
Orthorhombic |
|
Point group |
mm2 |
|
Space group |
Pna21 |
|
Lattice constants, Å |
a = 13,125, b = 6,5716, c = 10,786 |
|
Density, g/cm3 |
3,45 |
|
Melting point, °C |
1130 |
|
Mohs hardness |
5 |
|
Thermal conductivity, W/m*K |
k1=1.8, k2=1.9, k3=2.1 |
KTA Nolinear & Optical Properties:
|
Transparency |
350–5300 nm |
|
Absorption Coefficients |
<0.05 %/cm @ 1064 nm |
|
<0.05 %/cm @ 1533nm |
|
|
<5%/cm @ 3475nm |
|
|
Wavelength dispersion of
refractive indices |
nx2=1.90713+1.23522*λ2/ (λ2-0.196922)-0.01025*λ2 |
|
ny2=2.15912+1.00099*λ2/ (λ2-0.218442)-0.01096*λ2 |
|
|
nz2=2.14768+1.29559*λ2/ (λ2-0.227192)-0.01436*λ2 |
|
|
Electro optical constants |
r33=37.5 pm/V, r23=15.4 pm/V, r13=11.5 pm/V |
|
Effective nonlinearity |
x-y plane: deoe = doee = d15sin2φ + d24cos2φ |
|
x-z plane: doeo = deoo = d24sinθ |
|
|
d31=2.76 pm/V, d32=4.74 pm/V, d33=18.5 pm/V d24=3.2 pm/V, d15=2.3 pm/V |
|
|
SHG Phase Matchable Range |
1083-3789nm |