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KTA - Potassium Titanyl Arsenate (KTiOAsO4)
Introduction
Potassium Titanyl Arsenate (KTiOAsO4 or KTA) 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 conductivity results in higher damage threshold compared with KTP.
CASTECH offers KTA
- Crystal length from 0.1mm to 30 mm and size up to 10 × 10 × 30 mm3
- AR-coating from visible to 3300 nm
- Re-polishing, re-coating service
- Fast delivery (15 working days for polished only, 20 working days for AR-coated)
Table 1. Chemical and Structural 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 Mohs |
| 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 |
Table 2. Optical and Nonlinear Optical Properties
| Transparency Range | 350-5300 nm | ||||
| Absorption Coefficients |
< 0.05%/cm at 1064 nm < 0.05%/cm at 1533 nm < 5%/cm at 3475 nm |
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| NLO Susceptibilities | d31 = 2.76 pm/V d32 = 4.74 pm/V d33 = 18.5 pm/V d15 = 2.3 pm/V d24 = 3.2 pm/V | ||||
| Sellmeier Equation | index | A | B | C | D |
| Ni2 = Ai + Bi λ2/(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-optic Constants (low frequency) | r33 = 37.5 pm/V; r23 = 15.4 pm/V; r13 = 11.5 pm/V | ||||
| SHG Phase Matchable Range | 1083-3789 nm | ||||
Products
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KTA - Potassium Titanyl Arsenate (KTiOAsO4)
- KTA, an excellent NLO crystal for OPO device, features good NLO and E-O coefficients, low absorption in the 2.0-5.0 µm region, broad angular and temperature bandwidth, low dielectric constants, etc.
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Introduction
Potassium Titanyl Arsenate (KTiOAsO4 or KTA) 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 conductivity results in higher damage threshold compared with KTP.
CASTECH offers KTA
- Crystal length from 0.1mm to 30 mm and size up to 10 × 10 × 30 mm3
- AR-coating from visible to 3300 nm
- Re-polishing, re-coating service
- Fast delivery (15 working days for polished only, 20 working days for AR-coated)
Table 1. Chemical and Structural 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 Mohs |
| 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 |
Table 2. Optical and Nonlinear Optical Properties
| Transparency Range | 350-5300 nm | ||||
| Absorption Coefficients |
< 0.05%/cm at 1064 nm < 0.05%/cm at 1533 nm < 5%/cm at 3475 nm |
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| NLO Susceptibilities | d31 = 2.76 pm/V d32 = 4.74 pm/V d33 = 18.5 pm/V d15 = 2.3 pm/V d24 = 3.2 pm/V | ||||
| Sellmeier Equation | index | A | B | C | D |
| Ni2 = Ai + Bi λ2/(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-optic Constants (low frequency) | r33 = 37.5 pm/V; r23 = 15.4 pm/V; r13 = 11.5 pm/V | ||||
| SHG Phase Matchable Range | 1083-3789 nm | ||||
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