KTA Non-linear (NLO) Crystal
- Potassium Titanyle Arsenate (KTiOAsO4, KTA)
- KTA crystal (Potassium Titanyl Arsenate, KTiOAsO4) is a high-performance nonlinear optical (NLO) crystal, widely used for laser wavelength conversion and as an optical component.
Main Uses
- Optical Parametric Oscillation (OPO) and Optical Parametric Amplification (OPA)
- Particularly suitable for wavelength conversion in the mid-infrared region, utilized for generating infrared light sources in the 3-5 µm range.
- Second Harmonic Generation (SHG) and Sum Frequency Generation (SFG)
- Used for wavelength conversion of solid-state lasers (such as Nd:YAG), helpful in generating green and infrared light.
- Difference Frequency Generation (DFG)
- Generation of light sources in the crucial mid-infrared wavelength range for communication and spectroscopic analysis.
- Medical and Industrial Applications
- Wide-ranging applications including medical infrared lasers, communication, non-destructive testing, precision processing, and more.
- Research Applications
- Widely used in high-precision laser spectroscopy and nonlinear optical research.
Basic Properties
| Crystal Structure | Orthorhombic, point group mm2 |
|---|---|
| Lattice Parameter | a=13.125 Å, b=6.5716 Å, c=10.786 Å |
| Melting Point | 1130℃ |
| Mohs Hardness | near 5 |
| Density | 3.454 g/cm3 |
| Thermal Conductivity | K1:1.8 W/m/K; K2: 1.9 W/m/K; K3: 2.1 W/m/K |
Optical and Nonlinear Optical Properties
| Transparency Range | 350-5300 nm |
|---|---|
| Absorption Coefficients |
@ 1064 nm <0.05 %/cm @ 1533 nm <0.05 %/cm @ 3475 nm <5 %/cm |
| NLO susceptibilities (pm/V) |
d31 = 2.76, d32 = 4.74, d33 = 18.5, d15 = 2.3, d15 = 3.2 |
| Electro-optical constants(pm/V) (low frequency) |
γ33=37.5; γ23=15.4; γ13=11.5 |
| SHG Phase Matchable Range | 1083～3789 nm |
| Sellmeier Equation ※ | ||||
|---|---|---|---|---|
| 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 |