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KTA crystal
    Potassium Titanyle Arsenate(KTiOAsO4, or KTA) crystal is an excellent nonlinear optical crystal for Optical Parametric Oscillation (OPO) Application. OPO devices based on KTAs are reliable, solid state, tunable laser radiation exhibiting energy conversion efficiencies above 50%. In addition, KTA has a very high damage threshold.
  • DETAIL
  • STANDARD PRODUCT
  • BASIC PROPERTIES


  • In comparison to KTP, KTA crystals feature large non-linear optical and electro-optical coefficients and have significantly reduced absorption in the 2.0 - 5.0 m range. Its low dielectric constants, low loss tangent and ionic conductivities are orders of magnitude less than that of KTP.

     

    Application:

        ● Optical Parametric Oscillation (OPO)

        ● Frequency Doubling (SHG @1083nm-3789nm) 

        ● Sum and Difference Frequency Generation (SFG)/(DFG) 

        ● Electro-Optical Q-switch and modulation for Optical waveguides

     

    CRYSTIK‘s KTA is featured by：

        ● High damage threshold 

        ● Broad temperature and spectral bandwidth 

        ● Highly resistant to high intensity laser radiation.

        ● Wide angular bandwidth and small walk-off angle 

        ● Large nonlinear optical and electro-optical coefficients

        ● Lower absorption in the 3-4 µm spectrum range than KTP.

        ● Low dielectric constants, loss tangent and ionic conductivities (much less than that of KTP) 

     

    CRYSTIK offers：

        ● AR-coating from visible to 3300nm；
        ● Re-polishing, re-coating service；

        ● Crystal length from 0.1mm to 30mm and size up to 10x10x30mm3 or 5×5×30mm3
        ● Fast delivery (10 working days for polished only, 15 working days for AR-coated).


  • Dimension Tolerance

    W(+/-0.1)*H(+/-0.1)*L(+0.5/-0.1)mm

    Angle Tolerance

    +/-0.25°

    Perpendicularity

    ≤10′

    Scratch/Dig

    20/10

    Chamfer

    ≤0.2mmx45°

    Parallelism

    ≤20″

    Chips

    ≤0.1mm

    Flatness

    λ/10@633nm

    Clear Aperture

    ≥90%

    Wavefront distortion

    λ/4@633nm


    Coatings

    C1---AR@1064(R<0.2%)&1533(R<0.5%)&3475(R<10%)

    C2---

    Damage Threshold

    500MW/cm² (1064nm, 10ns, 10Hz)


  • 图片1.png

    Crystal Structure

    Orthorhombic,pna21,mm2

    Lattice Parameters

    a=1.312nm,b=0.656nm, c=1.0798nm,

    Density

    3.45 g/cm3

    Melting Point

    1130±5°C

    Ferroeletrictransition temperature (°C)

    880

    Ionic conductivity (room temperature,10kHz), s/cm

    0.7-3.4 x 10^6

    Absorption coefficient

    <0.1%/cm @ 1064nm
     <0.1%/ cm @ 1533nm 
     <5%/cm @ 3475nm

    Hygroscopic susceptibility

    No

    Dielectric constant:

    Σ33=42

    Thermal conductivity (mw/cm°C)

    k1=18,k2=19,k3=21

     

    Optical Properties:


    Transmitting range:

    0.35-5.3um

    Refractive indices(@ 1064nm): 

    nx=1.782

    ny=1.790,

    nz=1.868,

    Sellmeier equations:

    Ni^2=Ai+Biλ^2/(λ^2-Ci^2)-Diλ^2

    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

     

    Phase matching range(nm):

    1075-1134nm

    NCPM Angle

    q=90      j=0

    Wavelength

    Pump: 1064 nm Signal: 1533 nm  Idler: 3475 nm  

    Nonlinear Coefficients: (pm/v)

    d15 =2.3

    d24 =3.2

    d31 =2.8

    d32 =4.2

    d33 =16.2

    Electro-optic coefficients(low frequency, pm/v):

    r13=11.5

    r23=15.4

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