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Potassium Titanyl Phosphate (KTiOPO4 or KTP) is widely used in both commercial and military lasers including laboratory and medical systems, range-finders, lidar, optical communication and industrial systems.
Product Origin:
ChinaShipping Port:
Fuzhou, ChinaLead Time:
3-4weeks
Descriptions:
KTP Nonlinear crystal Potassium Titanyl Phosphate is the most commonly used material for frequency doubling of Nd-doped lasers, particularly at the low or medium power density. It is widely used for frequency mixing to generate Red/Green/Blue output, and for OPO and OPA to generate visible to mid-infrared tunable output. It is also used for many E-O devices such as Q-switches and E-O modulators.
Main applications:
1） Frequency Doubling (SHG) of Nd-doped Lasers for Green/Red Output;
2） Frequency Mixing (SFM) of Nd Laser and Diode Laser for Blue Output;
3） Parametric Sources (OPG, OPA and OPO) for 600nm - 4500nm Tunable Ouptut;
4） E-O Modulators, Optical Switches, Directional Couplers;
5） Optical Waveguides for Integrated NLO and E-O DevicesOPA and OPO.
Advantages:
1) Large nonlinear optical coefficient;
2) Wide angular bandwidth and small walk-off angle
3) Broad temperature and spectral bandwidth;
4) High Electro-Optics(E-O) coefficient and low dielectric constant;
5) Non-hygroscopic, chemically and mechanically stable
Optical and Nonlinear properties of KTP crystal
|
Transparency Range |
350~4500nm |
|
SHG Phase Matchable Range |
497 ~ 1800nm (Type II) |
|
Therm-optic Coefficient (/℃, λ in μm) |
dnx/dT=1.1X10-5 |
|
Absorption Coefficients |
<0.1%/cm at 1064nm <1%/cm at 532nm |
|
Angle Acceptance |
14.2mrad·cm (φ);55.3mrad·cm (θ) for Type II SHG of a Nd:YAG laser at 1064nm |
|
Temperature Acceptance |
24°C·cm for Type II SHG of a Nd:YAG laser at 1064nm |
|
Spectral Acceptance |
0.56nm·cm for Type II SHG of a Nd:YAG laser at 1064nm |
|
Walk-off Angle |
0.55° for Type II SHG of a Nd:YAG laser at 1064nm |
|
NLO Coefficients |
deff(II)≈(d24 - d15)sin2Φsin2θ - (d15sin2Φ + d24cos2Φ)sinθ |
|
Non-vanished NLO susceptibilities |
d31=6.5 pm/V d24=7.6 pm/V |
|
Sellmeier Equations (λ in μm) |
nx2=3.0065+0.03901/(λ2-0.04251)-0.01327λ2 |
|
Electro-optic Coefficients: r13 r23 r33 r51 r42 |
Low and High frequency (pm/V) 9.5 and 8.8 15.7and 13.8 36.3 and 35 7.3 and 6.9 9.3 and 8.8 |
|
Relative Dielectric Constant |
εeff=13 |
Physical properties of KTP crystal
|
Crystal Structure |
Orthorhombic, space group Pna21,point group mm2 |
|
Lattice Parameter |
a=6.404Å, b=10.616Å, c=12.814A, Z=8 |
|
Melting Point |
About 1172°C |
|
Mohs Hardness |
5 |
|
Density |
3.01 g/cm3 |
|
Refractive indices |
nX = 1,7404; nY = 1,7479; nZ = 1,8296 @1064 nm |
|
Thermal Conductivity |
13W/m/K |
|
Thermal Expansion Coefficients |
ax=11x10-6/℃, ay=9x10-6/℃, az=0.6x10-6/℃ |
HGO offers KTP specifications:
|
Tolerance of cutting angle |
△θ≤±0.25°,△φ≤±0.25° |
|
Tolerance of dimension |
Dimension+0/-0.1 mm，L：±0.1mm |
|
Flatness |
λ/10 @ 632.8nm |
|
Wavefront distortion |
λ/8@ 632.8nm |
|
Surface quality |
10/5 per MIL-O-13830A |
|
Parallelism |
20″ |
|
Perpendicularity |
5′ |
|
Clear Aperture: |
> 90% |
|
Chamfer: |
< 0.1 mm @ 45° |
|
Size |
Upon customer request |
|
Coating |
AR/HR coating upon customer’s request |
|
Damage Threshold |
750MW/CM2 at 1064nm, TEM00, 10ns, 10Hz |
|
Quality Warranty Period |
One year under proper use |
Why Choose HGO ?
HGO can supply high quality potassium titanyl phosphate (KTiOPO4, KTP) nonlinear crystals. Size up to 20mm*20mm*40mm and length from 0.1mm up to 80mm.
Besides, HGO provides high grey track resistance HGTR-KTP crystals as a solution, which significantly improves the grey-track resistance and overall performance. HGTR-KTP crystals extend the use of KTP as a nonlinear medium to high-power applications.
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