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 Structure | Orthorhombic, point group mm2, |
Lattice parameter | a=13.125À, b=6.5716À, c=10.786À |
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 |
Table 2．Optical and Nonlinear Optical Properties
TransparencyRange | 350-5300nm |
Absorption Coefficients |
@ 1064 nm <0.05 %/cm |
NLO susceptibilities(pm/V) | d31 = 2.76, d32 = 4.74, d33 = 18.5 , d15 = 2.3, d15 = 3.2 |
Sellmeier Equation Ni2=Ai+Biλ2/(λ2-Ci2)-Diλ2(λin um) |
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
|
Electro-optical constants(pm/V) (low frequency) | γ33=37.5;γ23=15.4;γ13=11.5 |
SHG Phase Matchable Range | 1083-3789nm |