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Crystals NLO Crystals KTA

KTA crystal, is an excellent nonlinear optical crystal for Optical Parametric Oscillation (OPO) Application. OPO devices based on KTAs are reliable, solid state sources of tunable laser radiation exhibiting energy conversion efficiencies above 50%. In addition KTA has a very high damage threshold.

In comparison to KTP, KTA crystals feature large non-linear optical and electro-optical coefficients and have significantly reduced absorption in the 2.0 - 5.0 m range. Its low dielectric constants, low loss tangent and ionic conductivities are orders of magnitude less than that of KTP.

Large nonlinear optical and electro-optical coefficients

Wide angular bandwidth and small walk-off angle

Broad temperature and spectral bandwidth

Low dielectric constants, loss tangent and ionic conductivities (much less than that of KTP)

High damage threshold

Lower absorption and high transmission in the 3-4 µm spectrum range than KTP.

Highly resistant to high intensity laser radiation.

Physical and Chemical Properties:

Please view NLO crysals physical Properities (dpf format)

The Sellmeier equations (l in µm ):

nx2=1.90713+1.23522l 2/(l 2-0.196922)-0.01025l 2
ny2=2.15912+1.00099l 2/(l 2-0.218442)-0.01096l 2
nz2=2.14768+1.29559l 2/(l 2-0.227192)-0.01436l 2

Optical and Spectral Properties:

Please view NLO crysals optical and nonlinear optical Properities (dpf format)


An excellent NLO crystal developed mainly for Optical Parametric Oscillation (OPO)

Frequency Doubling (SHG @1083nm-3789nm)

Sum and Difference Frequency Generation (SFG)/(DFG)

NCPM cut 1064--->1533+3475 (type I Theta=90deg., phi=0deg.)


Dimension tolerance:



<l/8 @633nm

Surface quality: Scratch/Dig



better than 30 arc sec.


better than 30 arc min

Angle tolerance:

q < 0.5°,f < 0.5°

AR coating:

AR coatings

Clear aperture:

>90% central area

Transmitting wave front distortion:

less than l/8 @ 633nm

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