Potassium titanyl phosphate (KTP)

Potassium titanium oxyphosphate (KTiOPO4, referred to as KTP) is a nonlinear optical crystal, belonging to the Orthorhombic crystal system. Its structure is composed of potassium ion, titanium ion, oxygen ion and phosphate ion. KTP crystals have large nonlinear optical coefficients, excellent electro-optical modulation performance, and excellent second harmonic generation (SHG) performance over a wide wavelength range. It also has good chemical and mechanical stability, as well as a high refractive index. KTP crystal is widely used in optoelectronics and Photonics. It is widely used in optical frequency conversion equipment, such as Frequency multiplier and parametric oscillator, and can effectively convert long wavelength laser to short wavelength laser. In addition, due to its excellent electro-optic properties, KTP crystals are also used in electro-optic modulators to achieve the control of electrical signals over optical signals. In Quantum information processing, KTP crystal is also used to realize the quantum entanglement of photons and the transmission of Quantum information.

Dihedral Technology(DHD) Co., Ltd. manufacture and processing/provide multiple specifications and high quality KTP crystal,targets,materials.

Applications

KTP can be used for laser frequency doubling, sum frequency, difference frequency, parametric oscillation, optical waveguide devices, and electro-optic modulators. Widely used in fields such as military research, medical treatment, ocean optics, laser weapons, and environmental remote sensing monitoring.

Features

It has the characteristics of large nonlinear coefficient, allowable temperature matching and angle matching range, high resistance to gray marks and light damage threshold, and stable chemical and mechanical properties.

Crystal structure	Orthorhombic
Lattice parameters	A=6.404 a, b=10.616 a, c=12.814 a, Z=8
Melting point	1172°C
Curie point	936°C
Mohs hardness	5
Density	3.01g/cm³
Linear absorption coefficient	<0.1%/cm at 1064nm <1%/cm at 532nm
The relative dielectric constant	Eeff=13
Specific heat	0.1643 cal/g.°C
Conductivity	3.5x10^-8 s/cm (c-axis, 22°C, 1KHz)
Thermal conductivity	13W/m/K
Transmission range	350~4500nm
Absorption coefficient	< 1%/cm @1064n M and 532 N M
SHG phase matching range	0.984-3.4 M
Calorescence coefficient (/ ℃)	dnx/dT=1.1x10^-5/℃ dny/dT=1.3x10^-5/℃ dnz/dT=1.6x10^-5/℃
Nonlinear coefficient	d31=2.54pm/V, d31=4.35pm/V, d31=16.9pm/V d24=3.64pm/V, d15=1.91pm/V at 1.064 µm deff(II)≈ (d24-d15)sin2φsin2θ-(d15sin2φ+d24cos2φ)sinθ
Sellmeier equation (λ in μm)	nx²=3.0065+0.03901/(λ²-0.04251)-0.01327λ² ny²=3.0333+0.04154/(λ²-0.04547)-0.01408λ² nz²=3.3134+0.05694/(λ²-0.05658)-0.01682λ²
Damage threshold	> 450MW/cm², (@1064nm 10ns, 10Hz)
Directional accuracy	Δθ<0.5°, Δφ<0.5°
Dimensional tolerance	±0.1mm
Standard Size	3×3×5mm, 5×5×5mm, 5×5×15mm, 10×10×15mm, 15×15×15mm
Surface finish	10/5
Clear aperture	>95%
Face type	<λ/8@633nm
Wavefront distortion	<λ/4@633nm
Parallelism	<20秒
Verticality	<15分
Residual reflectivity	<0.2%@1064nm, <0.5%@532nm
Shelf life	1 year
Coating	AR/AR@1064&532nm: S1&S2 AR@1064&532nm, R<0.25%@1064nm, R<0.5%@532nm HR/AR@1064&532nm: S1 HR@1064nm&HT@532nm, R>99.8%@1064nm, R<5%@532nm S2 AR@1064&532nm, R<0.25%@1064nm, R<0.5%@532nm

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Potassium titanyl phosphate (KTP)

Applications

Features

Properties