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Overview:
KTP (KTiOPO4) is an excellent nonlinear optical crystal in many optical systems like laboratory system, medical system, industrial system, etc. It 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. KTP’s properties also make it superior for electro-optic modulation, optical parametric generation.
General Specifications Of KTP:
| Dimension Tolerance |
W(+/-0.1)×H(+/-0.1)×L(+0.2/-0.1)mm |
| Angle Tolerance |
Δθ< 0.5°, Δφ< 0.5° |
| Surface Quality |
20/10 Scratch/Dig |
| Clear Aperture |
>90% |
| Surface Flatness |
<λ/8@633nm |
| Wavefront Distortion |
<λ/8@633nm |
| Parallelism |
<20 arc seconds |
| Perpendicularity |
<10 arc minutes |
| Residual Reflectivity |
<0.2% at 1064nm and <0.5% at 532nm |
| 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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| Damage Threshold |
500MW/cm² @1064nm 10ns 10Hz |
| Quality Warranty Period |
One year under proper use |
Standard Products of KTP:
| Dimension(mm) |
Theta(Deg) |
Phi(Deg) |
Coating |
Application |
| 3*3*5 |
90 |
23.5 |
AR/AR@1064&532nm |
SHG@1064,TypeⅡ |
| 3*3*5 |
90 |
23.5 |
HR/AR@1064&532nm |
SHG@1064,Type |
| 3*3*10 |
90 |
23.5 |
AR/AR@1064&532nm |
SHG@1064,TypeⅡ |
| 3*3*10 |
90 |
23.5 |
HR/AR@1064&532nm |
SHG@1064,TypeⅡ |
| 5*5*10 |
90 |
23.5 |
AR/AR@1064&532nm |
SHG@1064,TypeⅡ |
| 7*7*5 |
90 |
23.5 |
AR/AR@1064&532nm |
SHG@1064,TypeⅡ |
| 7*7*20 |
90 |
0 |
AR/AR@1573&1064nm |
OPO@1573&1064nm |
Physical and Optical Properties of KTP:
| Crystal Structure |
Orthorhombic, space group Pna21,point group mm² |
| Lattice Parameters |
a=6.404Å, b=10.616Å, c=12.814Å, Z=8 |
| Density |
3.01 g/cm3 |
| Mohs Hardness |
5 |
| Melting Point |
around 1172℃ |
| Absorption Coefficient |
< 0.1%/cm@1.064μm, < 1%/cm@0.532μm |
| Thermal Conductivity |
13W/m/K |
| Hygroscopic Susceptibility |
no |
| Transparency Range |
350nm-4500nm |
| SHG Phase Matchable Range |
497～1800nm (Type II) |
| Nonlinear Coefficient |
d31=6.5pm/v |
| d32=5pm/v |
| d33=13.7pm/v |
| d24=7.6pm/v |
| d15=6.1pm/v |
| Therm-optic Coefficients (/℃) |
dnx/dT=1.1X10-5 |
| dny/dT=1.3X10-5 |
| dnz/dT=1.6X10-5 |
| Sellmeier Equations (λin um) |
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 |
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