| Dimension | Maximum dimension 15x15x30mm | Dimensional Tolerance | (W+/-0.1mm)x(H+/-0.1mm)x(L+0.2/-0.1mm) |
| Wavefront Distortion | <Lambda/8@633nm | Chamfer | <0.15mm x 45° |
| Perpendicularity | < 5 arc min | Parallelism | <15 arc sec |
| Flatness | <Lambda/10 @ 633nm | Surface Quality | 10/5 S/D |
| 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 |
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| 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 | ||||||
Potassium Titanyle Arsenate(KTiOAsO4), or KTA Crystal, is an advantageous nonlinear optical crystal for Optical Parametric Oscillation (OPO) application. It has impressive non-linear optical and electro-optical coefficients, minute absorption in the 2.0-5.0 µm region, broad angular and temperature bandwidth, and low dielectric constants. It is also worth mentioning, that compared with KTP, the damage threshold of KTA crystals is higher attributed to their low ionic conductivities, and the absorption in the 3-4μm wavelength range is lower than the former.
Hangzhou Shalom EO is capable of growing KTA crystals of crystal length from 0.1-30mm, and dimensions up to 15x15x30mm, with the superior surface quality of 10/5 Scratch/Dig, and AR coatings at visible to 3300nm.
Common Applications of KTA Crystals:
1. Excellent for Optical Parametric Oscillation (OPO) for MWIR output up to 4 micros.
2. Second Harmonic Generation – SHG@1.083μm-3.789μm
3. Sum and Difference Frequency Generation (SFG and DFG)
4. Electro-optical Q-switch and modulation
