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KTP potassium titanium oxygen phosphate (KTiOPO4, KTP) is a double frequency crystal with excellent performance, and is widely used in commercial and military lasers, including laboratories, medical systems, range detectors, lidar, optical communications and industrial laser systems.
Product Description
KTP potassium titanium oxygen phosphate (KTiOPO4, KTP) is a double frequency crystal with excellent performance, and is widely used in commercial and military lasers, including laboratories, medical systems, range detectors, lidar, optical communications and industrial laser systems.
Main Features
Large nonlinear optical coefficient
Large receiving angle and small discrete angle
Wide temperature range and Wide spectral range
High photoelectric coefficient and low dielectric constant
Large resistance ratio
No water absorption, stable chemical and mechanical properties
Material Properties
| Crystal structure | Orthorhombic crystal system, space group Pna 21, Point group mm2 |
| Crystal lattice parameters | a=6.404Å, b=10.616Å, c=12.814Å, Z=8 |
| Melting point | 1172 ℃ |
| Mohs hardness | 5 |
| Density | 3.01 g/cm3 |
| Thermal conductivity | 13W/m/K |
| Thermal expansion coefficient | ax=11x10-6/℃,ay=9x10-6/℃,az=0.6x10-6/℃ |
Optical and nonlinear optical properties:
| Transparent band range | 350~4500nm |
| SHG phase-matching range | 497 ~ 1800nm (Type II) |
| Thermal Light Coefficient (/℃) | dnx/dT=1.1X10-5dny/dT=1.3X10-5dnz/dT=1.6X10-5 |
| Absorbance index | ＜0.1%/cm at 1064nm ＜1%/cm at 532nm |
| Type II SHG / Nd:YAG @ 1064nm | Temperature reception: 24°C · cmSpectral reception: 0.56nm · cmAngle reception: 14.2mrad · cm (φ); 55.3mrad · cm (θ)Discrete angle: 0.55° |
| Nonlinear coefficient | deff(II)≈(d24- d15)sin2φsin2θ - (d15sin2φ+ d24cos2φ)sinθ |
| Non vanised nonlinear magnetization coefficient | d31=6.5 pm/V d24=7.6 pm/Vd32= 5 pm/V d15=6.1 pm/Vd33=13.7 pm/V |
| Sellmeier equation（ λ/μ M) | nx2=3.0065+0.03901/(λ2-0.04251)-0.01327λ2ny2=3.0333+0.04154/(λ2-0.04547)-0.01408λ2nz2=3.3134+0.05694/(λ2-0.05658)-0.01682λ2 |
Typical applications:
Laser with frequency doubling Nd: YAG and other Nd doped crystals
KTP is also being used for mixing 810nm diode pump light and 1064nm Nd: YAG laser to generate blue light, and for intracavity frequency doubling with 1300nm light from Nd: YAG laser or Nd: YAP laser
Optical parametric amplification and oscillation (OPO and OPA)
Amplification of pump light generated by X-cut KTP crystals using non critical phase matching KTP crystals
Its insulation characteristics make it widely used in E-O, especially as an adjustable E-O device. Due to its high damage threshold, wide optical transmission band (>15GHz), stable thermal and chemical properties, and low absorption, LiNbO3 crystal is more suitable for E-O devices compared to LiNbO3 crystal
Optical waveguide application:
Product Parameters
| Wavefront distortion | ≦λ/8 @ 633nm |
| Dimensional tolerance | (W±0.1mm)x(H±0.1mm)x(L+0.5mm/-0.1mm)（L≥2.5mm）(W±0.1mm)x(H±0.1mm)x(L+0.1mm/-0.1mm)（L＜2.5mm） |
| Optical aperture | ≧90% |
| Flatness | λ/8 @ 633nm |
| Finish | 10/5 |
| Parallelism | ≦20" |
| Verticality | ≦5 ′ |
| Angular deviation | △θ≦0.25°,△φ≦0.25° |
| Damage threshold (GW / cm2) | > 10 @1064nm, TM 00,10ns, 10H z (polished only)> 1 @1064nm, TEM 00,10ns, 10H z (AR coated)> 0.5 @532nm, TEM 00,10ns, 10H z (AR coated) |
| Quality guarantee period | Normal use within one year |
