KTP crystal, Anti-Gray tracking KTP crystal, KTP crystal, i-KTP, Potassium Titanium Oxide Phosphate
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Home | KTP Specifications | Contact Us
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| Dimension | 1x1x0.05 - 30x30x40 mm |
| Phase matching type | Type II, θ=90°; φ=phase-matching angle |
| Typical Coating | a) S1&S2: AR
@1064nm R<0.1%; AR @ 532nm, R<0.25%. b) S1: HR @1064nm, R>99.8%; HT @808nm, T>5% S2: AR @1064nm, R<0.1%; AR @532nm, R<0.25% Customized coating available upon customer request. |
Main Specification:
| Angle tolerance | 6' Δθ< ± 0.5°; Δφ< ±0.5° |
| Dimension tolerance | ±0.02 - 0.1 mm (W ± 0.1mm) x (H ± 0.1mm) x (L + 0.2mm/-0.1mm) for NKC series |
| Flatness | λ/8 @ 633nm |
| Scratch/Dig code | 10/5 Scratch/dig per MIL-O-13830A |
| Parallelism | <10' better than 10 arc seconds for NKC series |
| Perpendicularity | 5' 5 arc minutes for NKC series |
| Wavefront distortion | less than λ/8 @ 633nm |
| Clear aperture | 90% central area |
| Working temperature | 25°C - 80°C |
| Homogeneity | dn ~10-6/cm |
Note:
To inquire or order a
finished KTP crystals, please provide detailed specifications as listed in the above. We require engineering drawing for
specific orientation.
For special applications, please consult us for the
designs if you are sure about the phase matching angle .
Please refer to "How to order a nonlinear crystal" for details.
Physical and Chemical Properties:
| Crystal structure | Orthorhombic |
| Point group | mm2 |
| Melting point | 1172°C incongruent |
| Lattice parameters | a=6.404Å, b=10.615Å, c=12.814Å, Z=8 |
| Temperature of decomposition | ~1150°C |
| Transition temperature | 936°C |
| Mohs hardness | ~5 |
| Density | 2.945 g/cm3 |
| Color | colorless |
| Hygroscopic susceptibility | no |
| Specific heat | 0.1737 cal/g.°C |
| Thermal conductivity | 0.13 W/cm/°C |
| Electrical conductivity | 3.5x10-8 s/cm (c-axis, 22°C, 1KHz) |
| Thermal expansion coefficients | a1 = 11 x 10-6
°C-1 a2 = 9 x 10-6 °C-1 a3 = 0.6 x 10-6 °C-1 |
| Thermal conductivity coefficients | k1 = 2.0 x 10-2
W/cm °C k2 = 3.0 x 10-2 W/cm °C k3 = 3.3 x 10-2 W/cm °C |
| Dielectric constant | eeff = 13 |
Optical Properties:
| Transmitting range | 350nm ~ 4500nm | |||||||||||||||||||||
| Refractive indices |
|
nx |
ny |
nz | ||||||||||||||||||
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1064nm |
1.7400 |
1.7469 |
1.8304 | |||||||||||||||||||
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532nm |
1.7787 |
1.7924 |
1.8873 | |||||||||||||||||||
| Absorption coefficients | a < 1%/cm @1064nm and 532nm | |||||||||||||||||||||
| Therm-optic coefficients | dnx/dT=1.1x10-5/°C dny/dT=1.3x10-5/°C dnz/dT=1.6x10-5/°C | |||||||||||||||||||||
| Electro-optic coefficients |
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| Sellmeier equations | nx2=2.10468
+ 0.89342λ2
/ ny2=2.14559 + 0.87629λ2 / nz2=1.9446 + 1.3617λ2 / | |||||||||||||||||||||
Nonlinear Properties:
| Phase matching range | 497nm – 3300 nm |
| Nonlinear
coefficients (@ 10-64nm) |
d31=2.54pm/V,
d31=4.35pm/V, d31=16.9pm/V d24=3.64pm/V, d15=1.91pm/V at 1.064 mm |
| Effective nonlinear optical coefficients | deff(II)≈ (d24 - d15)sin2qsin2j - (d15sin2j + d24cos2j)sinq |
Type
II SHG of 1064nm Laser:
| Phase matching angle | q=90°,
f=23.2° |
| Effective nonlinear optical coefficients | deff
»
8.3 x d36(KDP) |
| Angular acceptance | Dθ= 75 mrad Dφ= 18 mrad |
| Temperature acceptance | 25°C.cm |
| Spectral acceptance | 5.6 Åcm |
| Walk-off angle | 1 mrad |
| Optical damage threshold |
1.5-2.0MW/cm2 |