KTP 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. ADVANTAGES ● Efficient frequency conversion ● Wide angular bandwidth and small walk off angle ● Large nonlinear optical coefficients ● Broad temperature and spectral bandwidth ● High thermal conductivity
Standard 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 |
Specifications
Material | KTP |
Dimension | W×H：1×1~15×15mm, L:0.05-20mm |
Dimension tolerance | W(+/-0.1)×H(+/-0.1)×L(+0.2/-0.1)mm |
Angle Tolerance | +/-0.25° |
Flatness | <λ/8 @ 633nm |
Scratch/Dig | 20/10 |
Parallelism | ＜30 arc seconds |
Perpendicularity | ＜10 arc minutes |
Wavefront Distortion | < λ/8 @ 633nm |
Clear Aperture | > 90% |
Damage Threshold | 500MW/cm² @1064nm 10ns 10Hz |
Anti-Reflection Coating | AR@1064nm R<0.2%+532nm R<0.5% |
Properties
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 |
