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Nonlinear Crystals

  • Product Name: KTP
  • Dimension Tolerance:W x H (+/- 0.1mm) x L (+0.5/-0.1mm)
  • Angle Tolerance:Δθ ≤ 0.25°, Δφ ≤ 0.25°
  • Parallelism:< 20 arc seconds
  • Perpendicularity:< 5 arc minutes
  • Chamfer:0.1mm at 45°
  • Clear Aperture:90%
  • Scratch and Dig:10/5
  • Surface Flatness:λ/8 at 633nm
  • Wavefront Distortion:λ/8 at 633nm
  • Damage Threshold (AR coated):> 0.5 GW/cm2 TEM00, 10ns, 10Hz at 1064nm > 0.3 GW/cm2 TEM00, 10ns, 10Hz at 532nm

Product overview

KTP or Potassium Titanyl Phosphate (KTiOPO4) is widely used in both commercial and military lasers including laboratory and medical systems, range finders, lidar, optical communication and industrial systems. It has large nonlinear optical coefficient, wide angular bandwidth and small walk-of angle. As well as broad temperature and spectral bandwidth.

Scitlion is able to offer
Rod diameter from 1mm to 40mm
Length from 1mm to 60mm
Coating upon your request
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3.01 g/cm3

Melting Point


Mohs Hardness


Thermal Expansion

ax=11x10-6/℃, ay=9 x 10-6/℃, az=0.6 x 10-6/℃

Thermal Conductivity

13 W/m/K

Crystal Structure


Lattice Constants

a=6.404, b=10.616, c=12.814



Transparency Range

350nm to 4500nm

SHG Phase Matchable Range

497nm to 1800nm (Type II)

Thermal Optic Coefficients

dnx/dT=1.1 x 10-5/℃

dny/dT=1.3 x 10-5/℃

dnz/dT=1.6 x 10-5/℃

Absorption Coefficients

< 0.1% cm-1 at 1064nm

< 1% cm-1 at 532nm

Non Vanished NLO Susceptibilities

d31= 6.5 pm/V, d32=5 pm/V, d33=13.7 pm/V

d24=7.6 pm/V, d15=6.1 pm/V

Sellmeier Equation (λ in μm)

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

NLO Coefficients