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KTP (KTiOPO4) is an excellent non-linear crystal. It exhibts high optical quality, broad transparent range, relatively effective SHG coefficient ( about 3 times higher than that of KDP), very high optical damage threshold, wide acceptance angle, small walk-off , and type Ⅰand type Ⅱ non-critial phase-matching (NCPM) in a wide wavelength range. KTP is the most commonly used material for frequency doubling of Nd:YAG laser and other Nd-doped lasers, particularly at the low or medium power density. The properties of KTP make it superior as an electro-optic modulator as well as an optical waveguide device, including phase modulators, amplitude modulators and directional couplers.
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Nonlinear KTP crystal Advantage: KTP (KTiOPO4) is an excellent non-linear crystal. It exhibts high optical quality, broad transparent range, relatively effective SHG coefficient ( about 3 times .

Nonlinear KTP crystal Advantage:

KTP (KTiOPO4) is an excellent non-linear crystal. It exhibts high optical quality, broad transparent range, relatively effective SHG coefficient ( about 3 times higher than that of KDP), very high optical damage threshold, wide acceptance angle, small walk-off , and type Ⅰand type Ⅱ non-critial phase-matching (NCPM) in a wide wavelength range. KTP is the most commonly used material for frequency doubling of Nd:YAG laser and other Nd-doped lasers, particularly at the low or medium power density. The properties of KTP make it superior as an electro-optic modulator as well as an optical waveguide device, including phase modulators, amplitude modulators and directional couplers.

Nonlinear KTP crystal Applications:

? Second harmonic generator of radiation 1.064 μm

? Optical parametric oscilator in near IR region up to 4 μm

? Different frequency generator in near IR region



KPD Crystal Specification or or based on clients' requirements


Material:

Domestic or foreign materials are selected based on clients' requests

Dimensional tolerance:：

(W±0.1mm)x(H±0.1mm)x(L+0.5/-0.1mm)(L≥2.5mm)

(W±0.1mm)x(H±0.1mm)x(L+0.1/-0.1mm) (L<2.5mm)

Clear Aperture:

>90%

Surface Flatness

＜λ/8 @ 633nm

Wavefront distortion:

＜λ/8 @ 633nm

Chamfer：

≤0.2mm×@45°

Bevel：

≤0.1mm

Surface quality

＜10/ 5（MIL-PRF-13830B）

Parallelism of the passing light surface：

＜20"

Side perpendicularity：

≤5'

Angular tolerance：

△θ≤0.25°, △ф≤0.25°

Damage threshold [GW/cm2 ]：

>0.5 for 1064nm, TEM00, 10ns, 10HZ (AR-coated)

>0.3 for 532nm, TEM00, 10ns, 10HZ (AR-coated)

Quality guarantee period

1 year



Optical and nonlinear optical performance:

Transparent band range

350~4500nm

SHG phase matching range

497 ~ 1800nm   (Type II)

Thermal optical coefficient(/°C)

dnx/dT=1.1X10-5

dny/dT=1.3X10-5

dnz/dT=1.6X10-5


Absorption coefficient

&lt;0.1%/cm at 1064nm  &nbsp; <1%/cm at 532nm

For Type II SHG of a Nd:YAG laser at 1064nm

Temperature reception: 24°C·cm

Spectral reception: 0.56nm·cm

Angle reception: 14.2mrad·cm (φ);   55.3mrad·cm(θ)

Discrete angle: 0.55°


Nonlinearity coefficient

deff(II)≈(d24 - d15)sin2φsin2θ - (d15sin2φ+ d24cos2φ)sinθ

Non-vanished

d31=6.5 pm/V           d24=7.6 pm/V

d32= 5 pm/V        &nbsp;   d15=6.1 pm/V

d33=13.7 pm/V


Sellmeier   

nx2=3.0065+0.03901/(λ2-0.04251)-0.01327λ2

(λ in μm)

ny2=3.0333+0.04154/(λ2-0.04547)-0.01408λ2

nz2=3.3134+0.05694/(λ2-0.05658)-0.01682λ2