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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