KTA Crystals Description
Potassium Titanyle Arsenate (KTiOAsO4), commonly known as KTA, is a nonlinear optical crystal renowned for its excellent electro-optic properties and wide transparency range extending from the visible to the mid-infrared region (0.5 to 5.3 micrometers). KTA crystals are characterized by a high damage threshold, low dielectric constant, and good thermal stability, making them ideal for frequency conversion applications such as optical parametric oscillation, second harmonic generation, and sum-frequency generation. Additionally, KTA's high nonlinearity and low absorption losses contribute to its efficiency in laser systems and other advanced photonic applications.
KTA Crystals Specification
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Length
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0.1-30mm
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Size
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<15*15*30mm
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AR-coating
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visible to 3300nm
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Service
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Re-polishing, Re-coating
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Delivery
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10 working days for polished, 15 working days for AR-coated
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KTA Crystals Specifications
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Dimension tolerance:
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±0.1mm
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Flatness:
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λ/8 @633nm
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Surface quality: Scratch/Dig
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10/5
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Parallelism:
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better than 30 arc sec.
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Perpendicularity:
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better than 30 arc min
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Angle tolerance:
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△< 0.5°,△< 0.5°
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AR coating:
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from visible to 3300 nm
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Clear aperture:
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>90% central area
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Transmitting wave front distortion:
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less than λ/8 @ 633nm
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KTA crystals Features:
Large nonlinear optical coefficients
Wide angular bandwidth and small walk-off angle
Broad temperature and spectral bandwidth
Large electro-optic coefficients
Lower absorption in the 3-4 μm range than KTP.
Nonhydroscopic, chemically and mechanically stable
High thermal conductivity
High damage threshold
KTA crystals Properties
a.Linear Optical Properties:
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Transmitting Range
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350 nm - 5500 nm
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Refractive Indices:
1064nm
532nm
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nx ny nz
1.7818 1.7866 1.8680
1.8264 1.8331 1.9310
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Sellmeier Equations
(l in μm)
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nx2=1.90713+1.23522l2 /(l2-0.19692)-0.01025l2
ny2=2.15912+1.00099l2 /(l2-0.21844)-0.01096l2
nz2=2.14768+1.29559l2/(l2-0.22719)-0.01436l2
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Thermo-optic Coefficients
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dnx/dT=1.1x10-5/oC, dny/dT=1.3x10-5/oC
dnz/dT=1.6x10-5/oC
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Absorption Coefficient
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a < 1% cm-1 @1064nm and 532nm
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b. Nonlinear Optical Properties:
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Phasematchable SHG Range
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542 - 1800nm
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Nonlinear Optical Coefficients
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d31=2.8pm/v, d32=4.2pm/v,
d33=16.2pm/v,d24=3.2pm/v,
d15=2.3pm/v
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Effective Nonlinearity Expressions
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deff(II)= (d24-d15)sin2fsin2q-(d15sin2f+d24cos2f)sinq
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Electro-optic Coefficients
( Low frequency )
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r13= 11.5pm/V, r23=15.4pm/V, r33=37.5pm/V
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Dielectric Constant
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eeff=42
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Applications of KTA crystals:
1. Optical Parametric Oscillators (OPOs): KTA is commonly used in OPOs for frequency conversion to generate tunable laser light from the visible to the mid-infrared range.
2. Second Harmonic Generation (SHG): It is utilized for doubling the frequency of laser light, particularly in applications requiring high power and efficiency.
3. Sum-Frequency Generation (SFG): KTA is employed in SFG processes to combine two different frequencies of light to produce a third frequency, expanding the range of wavelengths available from laser sources.
4. Difference Frequency Generation (DFG): KTA is used to generate new wavelengths by mixing two frequencies and subtracting one from the other, useful in spectroscopy and other precision measurement techniques.
5. Electro-Optic Modulators: Due to its excellent electro-optic properties, KTA is used in devices that modulate the phase, frequency, or amplitude of light in advanced communication systems.
6. Laser Systems: KTA crystals are integrated into various laser systems to enhance performance and efficiency, particularly in medical, military, and industrial applications.
Potassium Titanyle Arsenate Packing
Our Potassium Titanyle Arsenate is carefully handled to prevent damage during storage and transportation and to preserve the quality of our product in its original condition.
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