KTP Crystals
A nonlinear crystal with a high damage threshold and thermal shock resistance, KTP provides efficient Nd:YAG frequency doubling. This NLO is used in a broad range of medical, industrial, and scientific applications.
KTP Crystals Product Information
Potassium Titanyl Phosphate (KTP) has the following exceptional properties that make it a very important nonlinear crystal:
- Large nonlinear optical coefficient
- Wide angular bandwidth and small walk-off angle
- Broad temperature and spectral bandwidth
- High electro-optic coefficient and low dielectric constant
- Large figure of merit
- Nonhydroscopic, chemically and mechanically stable
- High thermal conductivity
- Moisture free
- Minimum mismatch gradient
- Low cost compare with BBO and LBO
KTP is a negative biaxial crystal, with the principal axes X, Y, and Z (nz>ny>nx) parallel to the crystallographic axes a, b, and c, respectively.
| Crystal structure | Orthorhombic, space group Pna21,point group mm2 |
| Cell parameters | a=6.404Å, b=10.616Å, c=12.814Å, Z=8 |
| Melting point | 1172°C incongruent |
| Curie point | 936°C |
| Mohs hardness | ≈ 5 |
| Density | 3.01 g/cm3 |
| Color | colorless |
| Hygroscopic susceptibility | no |
| Specific heat | 0.1643 cal/g×°C |
| Thermal conductivity | 0.13 W/cm/°K |
| Electrical conductivity | 3.5x10-8 s/cm (c-axis, 22°C, 1KHz) |