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        • Product ID: 107
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        Potassium Titanyle Arsenate(KTiOAsO4, KTA)


        Potassium Titanyle Arsenate(KTiOAsO4), or KTA crystal, is an excellent nonlinear optical crystal for Optical Parametric Oscillation (OPO) application. It has better non-linear optical and electro-optical coefficients, significantly reduced absorption in the 2.0-5.0 µm region, broad angular and temperature bandwidth, low dielectric constants. And its low ionic conductivities   result in higher damage threshold compared with KTP .

        CASTECH offers KTA
        Crystal length from 0.1mm to 30mm and size up to 15x15x30mm
        AR-coating from visible to 3300nm
        Re-polishing, re-coating service
        Fast delivery(10 working days for polished only, 15 working days for AR-coated)
          
                                Table 1. Basic properties

         

         

        Crystal Structure
        Orthorhombic, point group mm2,
        Lattice parameter
        a=13.125À, b=6.5716À, c=10.786À
        Melting point
        1130℃
        Mohs Hardness
        near 5
        Density
        3.454g/cm3
        Thermal conductivity
        K1:1.8W/m/K;  K2: 1.9W/m/K;  K3: 2.1W/m/K
         
                              Table 2.Optical and Nonlinear Optical Properties

         

         

        TransparencyRange
        350-5300nm
        Absorption Coefficients
        @ 1064 nm <0.05 %/cm 
        @ 1533 nm <0.05 %/cm 
        @ 3475 nm <5%/cm
        NLO susceptibilities(pm/V)
        d31 = 2.76, d32 = 4.74, d33 = 18.5 , d15 = 2.3, d15 = 3.2
         
        Sellmeier Equation
        Ni2=Ai+Biλ2/(λ2-Ci2)-Diλ2(λin um)
        index
        A
        B
        C
        D
        Nx
        1.90713
        1.23522
        0.19692
        0.01025
        Ny
        2.15912
        1.00099
        0.21844
        0.01096
        Nz
        2.14768
        1.29559
        0.22719
        0.01436
         
        Electro-optical constants(pm/V)
        (low frequency)
        γ33=37.5; γ23=15.4; γ13=11.5
        SHG Phase Matchable Range
        1083-3789nm