Potassium Titanyle Arsenate - KTA Crystals

Potassium titanyle arsenate (KTiOAsO4), or KTA, is a nonlinear optical crystal for Optical Parametric Oscillation (OPO) application. It has good non-linear optical and electro-optical properties, e.g. significantly reduced absorption in band range of 2.0-5.0 µm, broad angular and temperature bandwidth, low dielectric constants.

 

Primary applications of KTA crystals:

  • OPO for mid IR generation – up to 4 µm;
  • Sum and Difference Frequency Generation in mid IR range;
  • Electro-optical modulation and Q-switching;

EKSMA OPTICS offers:

  •  Standard KTA crystals ex-stock and crystals with size up to 15x15x30 mm under request;
  • AR and BBAR coatings for VIS-IR and mid IR ranges;
  • Standard and customized mounts and housings; Technical consulting.
Delivery

Estimated delivery time: from 4 - 5 days

θ
φ
Coating
W, mm
H, mm
L, mm

For nanosecond OPO@1064 nm pump to generate in 1.5-4.5 μm range

Code θ φ Coating W, mm H, mm L, mm Price Delivery Add to cart
KTA-503 45 0 AR@1064+(1500-4500) nm 5 5 20 2283 $ Request To cart

For picosecond OPG/A@1064 nm pump to generate in 1.5-4.5 μm range

Code θ φ Coating W, mm H, mm L, mm Price Delivery Add to cart
KTA-504 45 0 AR@1064+(1500-4500) nm 5 5 10 1219 $ Request To cart

For DFG mixing signal and idler at 1.2-2.4 microns to generate wavelengths from 2.6 μm up to 5 μm

Code θ φ Coating W, mm H, mm L, mm Price Delivery Add to cart
KTA-601H 47 0 AR/AR@1.2-2.4/2.6-5.0 μm 6 6 1 776 $ Request To cart

Crystal is for DFG application, whereas signal and idler waves are obtained from BBO crystal using OPG/A pumped by femtosecond Ti:Sapphire laser.

For OPO@1030 nm pump to generate wavelengths from 1.5 up to 5 microns

Code θ φ Coating W, mm H, mm L, mm Price Delivery Add to cart
KTA-602H 46 0 AR@1030+(1700-5000) nm 6 6 3 679 $ 4 - 5 days To cart

Crystal is dedicated for femtosecond laser pump with pulse duration ~100-300 fsec.

Delicious

 SPECIFICATIONS

Flatness  λ/8@633 nm
Parallelism > 20 arc sec
Surface quality   10/5 Scratch/Dig (MIL-PRF-13830B)
Perpendicularity   > 15 arc min
Angle tolerance < ± 0.2° 
Aperture tolerance:  ± 0.1 mm
Clear aperture   >90% central area
Transmitting wavefront distortion less than λ/8@633 nm


PHYSICAL PROPERTIES

Crystal structure orthorhombic
Point group mm2
Space group  Pna21
Lattice constants, Å a = 13,125, b = 6,5716, c = 10,786
Density, g/cm3 3,45
Melting point, °C  1130
Mohs hardness  5
Thermal conductivity, W/m*K k1=1.8, k2=1.9, k3=2.1
Not hygroscopic   


NONLINEAR & OPTICAL PROPERTIES

Transparency  350–5300 nm
Wavelength dispersion of refractive indices  nx2=1.90713+1.23522*λ2/ (λ2-0.196922)-0.01025* λ2
ny2=2.15912+1.00099*λ2/ (λ2-0.218442)-0.01096* λ2
nz2=2.14768+1.29559*λ2/ (λ2-0.227192)-0.01436* λ2
Electro optical constants r33=37.5 pm/V
r23=15.4 pm/V
r13=11.5 pm/V
Effective nonlinearity   
x-y plane deoe = doee = d15sin2φ + d24cos2φ
x-z plane doeo = deoo = d24sinθ
  d31=2.3 pm/V 
d32=3.66 pm/V
d33=15.5 pm/V
d24=3.64 pm/V
d15=2.3 pm/V
Damage threshold >500 MW/cm2 for pulses λ=1064 nm, τ=10ns, 10Hzm TEM00
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