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Nonlinear Crystals

  • Product Name: KTA
  • 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

KTA or Potassium Titanyl Arsenate (KTiOAsO4) is an excellent nonlinear optical crystal for Optical Parametric Oscillation(OPO) application. It has better nonlinear optical and electro optical coefficients, significantly reduced absorption in the region of 2μm to 5μm, broad angular and temperature bandwidth, low dielectric constants.

Scitlion is able to offer
Rod diameter from 1mm to 30mm
Length from 1mm to 30mm
Coating upon your request


3.454 g/cm3

Melting Point


Mohs Hardness


Thermal Conductivity

K1: 1.8W/m/K; K2: 1.9W/m/K; K3: 2.1W/m/K

Crystal Structure

Orthorhombic, Point Group mm2

Lattice Constants

‘a = 13.125A,  b = 6.5716A,  c = 10.786A



Transparency Range

350nm to 5300nm

Absorption Coefficients

< 0.05% cm-1 at 1064nm

< 0.05% cm-1 at 1533nm

< 5% cm-1 at 3475nm

NLO Susceptibilities 

d31=2.76, d32=4.74, d33=18.5, d15=2.3

Refractive Index

Nx =1.90713, Ny=2.15912, Nz=2.14768 (A)

Nx=1.23522, Ny=1.00099, Nz=1.29559 (B)

Nx=0.19692, Ny=0.21844, Nz=0.22719 (C)

Nx=0.01025, Ny=0.01096, Nz=0.01436 (D)

Sellmeier Equation (λ in μm)

N12=A1+B1λ2/(λ2-C12) – D1λ2

SHG Phasse Matchable Range

1083nm to 3789nm