KTA
Potassium
Titanyle Arsenate(KTiOAsO4), or KTA crystal, is an excellent nonlinear
optical crystal for Optical Parametric Oscillation (OPO) application.
It has better non-linear optical and electro-optical coefficients, significantly
reduced absorption in the 2.0-5.0 µm region, broad angular and temperature
bandwidth, low dielectric constants. And its low ionic conductivities
result in higher damage threshold compared with KTP .
Physical and Optical Properties
Crystal Structure Orthorhombic, point group mm2,
Lattice parameter a=13.125À, b=6.5716À, c=10.786À
Melting point 1130deg. C
Mohs Hardness near 5
Density 3.454g/cm3
Thermal conductivity K1:1.8W/m/K; K2: 1.9W/m/K; K3: 2.1W/m/K
Transparency Range: 350-5300nm
Absorption Coefficients:
<0.05 %/cm @1064 nm
<0.05 %/cm @ 1533 nm
<5%/cm @ 3475 nm
NLO susceptibilities(pm/V): d31 = 2.76, d32 = 4.74, d33 = 18.5 , d15 = 2.3, d15 = 3.2
Sellmeier Equation:
Ni2=Ai+Bi*L^2/(L^2-Ci2)-Di*L^2
(L in um) index A B C D
Nx 1.90713 1.23522 0.19692 0.01025
Ny 2.15912 1.00099 0.21844 0.01096
Nz 2.14768 1.29559 0.22719 0.01436
Electro-optical constants(pm/V)
(low frequency): r33=37.5; r23=15.4; r13=11.5
SHG Phase Matchable Range: 1083-3789nm
General Specification:
Crystal length from 0.1mm to 30mm and size up to 15x15x30mm
AR-coating from visible to 3300nm
Re-polishing, re-coating service
