KTA Crystal – Potassium Titanyl Arsenate Nonlinear Optical Crystal

Description

KTA (Potassium Titanyl Arsenate, KTiOAsO₄) is a high-performance nonlinear optical (NLO) crystal widely used in frequency conversion, optical parametric oscillation (OPO), electro-optic modulation, and mid-infrared laser generation. Compared with KTP crystals, KTA offers lower absorption in the 2–5 μm region, higher resistance to gray tracking, and superior performance in high-energy laser systems.

KTA crystals are especially suitable for mid-IR OPO systems, Nd:YAG laser frequency conversion, and electro-optic devices due to their excellent nonlinear coefficients, wide transparency range, and high optical damage threshold.

Key Features and Properties

• Wide transmission range: 350–5300 nm
• High nonlinear optical coefficients
• Excellent electro-optic properties
• Low absorption at 1064 nm and 1533 nm
• Suitable for mid-IR frequency conversion
• High laser damage threshold
• Reduced gray-tracking effect compared with KTP
• Chemically stable and non-hygroscopic

Technical Specifications

Chemical Formula	KTiOAsO₄
Crystal System	Orthorhombic
Point Group	mm2
Lattice Constants	a=13.125 Å, b=6.5716 Å, c=10.786 Å
Transparency Range	350 – 5300 nm
Density	3.454 g/cm³
Mohs Hardness	~5
Melting Point	1130 °C
Thermal Conductivity	1.8 / 1.9 / 2.1 W/m/K
Nonlinear Coefficients	d₃₁=2.76, d₃₂=4.74, d₃₃=18.5 pm/V
Electro-Optic Coefficients	r₃₃=37.5 pm/V
Absorption @1064 nm	<0.05%/cm
Absorption @1533 nm	<0.05%/cm
Absorption @3475 nm	<5%/cm
SHG Phase Matching Range	1083 – 3789 nm
Surface Quality	20/10 or 40/20
Flatness	λ/8 @632.8 nm
Coating Options	AR, HR, Broadband
Applications	OPO, OPA, Mid-IR Lasers, EO Modulation

 

Typical Applications

• Optical Parametric Oscillators (OPO)
• Optical Parametric Amplifiers (OPA)
• Frequency doubling (SHG) and difference-frequency generation (DFG)
• Mid-infrared laser generation
• Electro-optic modulators and Q-switches
• Nd:YAG and Er:YAG laser systems
• Tunable laser systems
• Laser spectroscopy and remote sensing

Material Properties and Crystal Structure

• Chemical Formula: KTiOAsO₄
• Crystal System: Orthorhombic
• Point Group: mm2
• Lattice Constants:
  • a = 13.125 Å
  • b = 6.5716 Å
  • c = 10.786 Å
• Density: 3.454 g/cm³
• Mohs Hardness: ~5
• Melting Point: 1130 °C

Thermal Conductivity

• K₁: 1.8 W/m/K
• K₂: 1.9 W/m/K
• K₃: 2.1 W/m/K

Optical Properties

• Transparency Range: 350–5300 nm

Absorption Coefficient

• <0.05%/cm @ 1064 nm
• <0.05%/cm @ 1533 nm
• <5%/cm @ 3475 nm

Nonlinear Optical Coefficients

• 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

Electro-Optic Coefficients (Low Frequency)

• r₃₃ = 37.5 pm/V
• r₂₃ = 15.4 pm/V
• r₁₃ = 11.5 pm/V

SHG Phase Matching Range

• 1083 – 3789 nm

Customization Options

Tinsan Materials provides customized KTA crystals based on customer requirements:

• Custom dimensions and aperture sizes
• Specific phase-matching angles
• High-damage-threshold AR coatings
• Dual-band or broadband coatings
• Precision orientation tolerances (<0.1°)
• Mounted crystal assemblies available

Packaging and Delivery

• Vacuum-sealed cleanroom packaging
• Shockproof crystal protection box
• Moisture-resistant packaging materials
• Standard lead time: 2–4 weeks
• Express shipping available worldwide

Why Choose Our KTA Crystals

• High optical homogeneity and low bulk absorption
• Strict crystal growth and quality control process
• Precision polishing and coating capabilities
• Stable performance in high-power laser systems
• Custom-engineered solutions for research and industrial applications
• Global supply experience for photonics and laser industries

Ordering & Contact Information

We offer flexible MOQ (Minimum Order Quantity), competitive pricing and global shipping. For custom orders or technical inquiries, please contact us for a detailed consultation!