KTA - Potassium Titanyl Arsenate (KTiOAsO4)

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Related Items

KDP / DKDP - Potassium Dihydrogen / Dideuterium Phosphate

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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

N_i²= A_i+ B_i λ²/(λ² - C_i²) - D_iλ²(λ in μm)	n_x	1.90713	1.23522	0.19692	0.01025
	n_y	2.15912	1.00099	0.21844	0.01096
	n_z	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