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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. 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 .
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CASTECH offers KTA:

       •   Crystal length from 0.1mm to 30mm and size up to 10x10x30mm3
       •   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=13.125Å, b=6.5716Å, c=10.786Å
Melting Point

1130 ˚C

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

Transparency Range 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, d24 = 3.2

Sellmeier Equation 

Ni2=Ai+Biλ2/(λ2-Ci2)-Diλ2

 (λ in μm)

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)

33=37.5; r23=15.4; r13=11.5

SHG Phase Matchable Range

1083-3789nm

 

 

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  • NLO Crystals_Potassium Titanyl Arsenate(KTiOAsO4 , KTA).pdf