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
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Crystal Structure
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Orthorhombic, point group mm2,
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Lattice parameter
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a=13.125À, b=6.5716À, c=10.786À
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Melting point
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1130℃
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Mohs Hardness
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near 5
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Density
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3.454g/cm3
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Thermal conductivity
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K1:1.8W/m/K; K2: 1.9W/m/K; K3: 2.1W/m/K
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Table 2．Optical and Nonlinear Optical Properties
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TransparencyRange
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350-5300nm
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Absorption Coefficients
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@ 1064 nm <0.05 %/cm
@ 1533 nm <0.05 %/cm
@ 3475 nm <5%/cm
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NLO susceptibilities(pm/V)
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d31 = 2.76, d32 = 4.74, d33 = 18.5 , d15 = 2.3, d15 = 3.2
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Sellmeier Equation
Ni2=Ai+Biλ2/(λ2-Ci2)-Diλ2(λin um)
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index
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A
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B
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C
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D
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Nx
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1.90713
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1.23522
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0.19692
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0.01025
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Ny
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2.15912
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1.00099
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0.21844
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0.01096
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Nz
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2.14768
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1.29559
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0.22719
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0.01436
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Electro-optical constants(pm/V)
(low frequency)
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γ33=37.5; γ23=15.4; γ13=11.5
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SHG Phase Matchable Range
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1083-3789nm
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