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KTA - Potassium Titanyl Arsenate (KTiOAsO4)

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KTA - Potassium Titanyl Arsenate (KTiOAsO4)
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  • KTA - Potassium Titanyl Arsenate (KTiOAsO4)

  • KTA, an excellent NLO crystal for OPO device, features good NLO and E-O coefficients, low absorption in the 2.0-5.0 µm region, broad angular and temperature bandwidth, low dielectric constants, etc.
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Introduction

Potassium Titanyl Arsenate (KTiOAsO4 or KTA) 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 conductivity results in higher damage threshold compared with KTP.

  

CASTECH offers KTA

  • Crystal length from 0.1mm to 30 mm and size up to 10 × 10 × 30 mm3
  • AR-coating from visible to 3300 nm
  • Re-polishing, re-coating service
  • Fast delivery (15 working days for polished only, 20 working days for AR-coated)

 

Table 1. Chemical and Structural Properties

Crystal Structure Orthorhombic, Point group mm2
Lattice Parameter

a = 13.125 Å, 

b = 6.5716 Å, 

c = 10.786 Å

Melting Point 1130 ℃
Mohs Hardness Near 5 Mohs
Density 3.454 g/cm3
Thermal Conductivity K1: 1.8 W/m/K; K2: 1.9 W/m/K; K3: 2.1 W/m/K

 

 

Table 2. Optical and Nonlinear Optical Properties

Transparency Range 350-5300 nm
Absorption Coefficients

 < 0.05%/cm at 1064 nm 

< 0.05%/cm at 1533 nm 

< 5%/cm at 3475 nm

NLO Susceptibilities d31 = 2.76 pm/V     d32 = 4.74 pm/V     d33 = 18.5 pm/V     d15 = 2.3 pm/V     d24 = 3.2 pm/V
Sellmeier Equation index A B C D
Ni2 = Ai + Bi λ2/(λ2 - Ci2) - Diλ2 (λ in μm) 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-optic Constants (low frequency) r33 = 37.5 pm/V; r23 = 15.4 pm/V; r13 = 11.5 pm/V 
SHG Phase Matchable Range 1083-3789 nm

 

 

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

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