Super Potassium Titanyl Phosphate(S-KTP) is a positive biaxial crystal, with the principal axes X, Y, and Z (nz>ny>nx ) parallel to the crystallographic axes a, b, and c, respectively.
Large nonlinear optical coefficient. Wide angular bandwidth and small walk-off angle. Broad temperature and spectral bandwidth. High thermal conductivity.
Transmitting wave front distortion: less than /8 @ 633nm
Advantage: 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
The Sellmeier equations (in μm ):
nx2=1.90713+1.235222/(2-0.196922)-0.010252
ny2=2.15912+1.000992/(2-0.218442)-0.010962
nz2=2.14768+1.295592/(2-0.227192)-0.014362
Application: An excellent NLO crystal developed mainly for Optical Parametric Oscillation (OPO). Frequency Doubling (SHG @1083nm-3789nm). Sum and Difference Frequency Generation (SFG)/(DFG) . Optical waveguides for integrated NLO and E-O devices.
Large nonlinear optical coefficient.
