CLASSIFICATION
KTA
Categories:
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.
Processing indicators
Size Tolerance | W±0.1 mm×H±0.1mm×L+0.5/-0.1 mm (L≥2.5 mm) |
CA | ≥90% |
S/D | 10/5 according to MIL-PRF-13830B |
Flatness | ≤λ/10@633nm |
WFD | ≤λ/4@633nm |
Parallelism | 20" |
Perpendicularity | ≤10' |
Angle tolerance | ≤0.25° |
Chamfer | ≤0.2mm@45° |
Chip | ≤0.1mm |
LIDT | >1 GW/cm²@1064nm,10ns,10 Hz (AR coating) |
Standard Products
Part Number | Size | Application |
1.CR.KTA.070720.P002 | 7X7X20 mm | OPO@1064nm->1540nm |
1.CR.KTA.070715.P002 | 7X7X15 mm | OPO@1064nm->1540nm |
1.CR.KTA.050520.C005 | 5X5X20 mm | OPO@1064nm->1540nm |
1.CR.KTA.040420.C102 | 4X4X20 mm | OPO@1064nm->1540nm |
1.CR.KTA.040415.P002 | 4X4X15 mm | OPO@1064nm->1540nm |
Transmittance curve of KTA
Physical and Optical Properties
Physical Properties:
Crystal Structure | Orthorhombic, Point group mm2 |
Lattice Parameters | a=13.125Å ,b=6.5716Å, c=10.786Å; Z=8 |
Density | 3.454 g/cm3 |
Mohs Hardness | ~ 5 |
Melting Point | 1130°C |
Curie Point | 880°C |
Specific Heat | 0.687 cal/goC (25oC) |
Dielectric Constant | eeff =42 |
Absorption Coefficient | <0.05%/cm @1μm and 1.5μm |
Electrical Conductivity | 0.7-3.4 x10-6s/cm (c-axis, 22oC, 2KHz) |
Color | Colorless |
Hygroscopic Susceptibility | No |
Optical Properties:
Transparency Range | 0.35μm ~ 5.3μm | ||
Nonlinear Coefficients | d31=2.8 pm/V, d32=4.2 pm/V, d33=16.2 pm/V | ||
(@1.064μm) | d24=3.2 pm/V, d15=2.3 pm/V | ||
Electro-optical constants | r33 | r23 | r13 |
(low frequency) | 37.5 pm/V | 15.4 pm/V | 11.5 pm |
Sellmeier Equations | nx2 = 1.90713+1.23522l2/(λ2-0.19692)-0.01025λ2 | ||
(λ in μm) | ny2 = 2.15912+1.00099l2/(λ2-0.21844)-0.01096λ2 | ||
| nz2 = 2.14768+1.29559l2/(λ2-0.22719)-0.01436λ2 | ||
Refractive Indexes (@1.064μm) | nx | ny | nz |
1.783 | 1.7893 | 1.8679 | |
SHG PM range | 1μm ~ 3μm | ||
cut angle for NCPM OPO | θ | φ | |
90 | 0 | | |
wavelength for NCPM OPO | Pump | Signal | Idler |
1064 nm | 1533 nm | 3475 nm | |
KTA (KTiOAsO4)
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.
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