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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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Description
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Cas'Tech Class
Parameters

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

Ni2=Ai+Bλ2/(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-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

 

Keyword:
optical parametric oscillation
KTA
Nonlinear crystal
electro-optical coefficient
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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.
Description
Cas'Tech Class
Parameters
Download

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

Ni2=Ai+Bλ2/(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-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

 

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