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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