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.

KTP Structural and Physical Properties
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)