Lithium Tantalate crystal ( LiTaO3 )
Lithium Tantalate exhibits unique electro-optical,
pyroelectric and piezoelectric properties combined with good mechanical
and chemical stability and , wide transparency range and high optical damage
threshold. This makes LiTaO3 well-suited for numerous applications including
electro-optical modulators, pyroelectric detectors, optical waveguide and
SAW substrates, piezoelectric transducers etc.
Material propeties
| Crystal symmetry |
Trigonal, 3m |
| Lattice constant, A |
a = 5.154 c
= 13.783 |
| Density, g/cm3 |
7.45 |
| Melting point , °C |
1650 |
| Curie point , °C |
610 |
| Mohs hardness |
6 |
| Solubility |
Insoluble in water |
| Color |
Colorless or light yellow |
| Thermal expansion coefficient, 10-6/ °C |
aa = 16 ac = 4 |
| Specific heat, cal/g°C |
0.06 |
| Thermal conductivity , mW/cm °C |
46 |
| Dielectric Constant (@ 100 KHz) |
ea =
54 ec = 43 |
| Transparency range, nm |
400 - 5500 |
| Refractive indices @ 633 nm |
no = 2.175 ne = 2.180 |
Electro-optic coefficients
pm/V @633 nm, high frequency |
r33 = 33
r13 = 8
r22 = 20 |
Nonlinear optical coefficients
p/m/V @ 1064 nm |
d22 = 2.0
d31 = - 1
d33 = -21 |
| Pyroelectric Coefficient: |
-2.3 10-4 C/°C/m2 |
| Optical homogeneity |
~10-5 |
| Absorption loss @ 1064 nm |
< 0.15
%/cm |
Lithium Tantalate products offered by ELAN :
Electro – Optic Pockels Cells
Optical Waveguide Substrates
Pyroelectric
Detector Substrates
Piezoelectric Transducers |
