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.
| 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 |
Electro – Optic Pockels Cells
Optical Waveguide Substrates
Pyroelectric Detector Substrates
Piezoelectric Transducers
Lithium Tantalate Crystal
we supply LiTaO3 wafers as well as LiTaO3 bulk crystals.
An example of LiTaO3 crystal is shown below
LiTaO3 crystal for EOM (Electro-optic modulator) - request a quote
5 mm (X) x 5 mm (Z) x 40 mm (Y)
Sides 5x5 are polished 20/10 S/D and
AR coated
Metal electrodes Au+Cr
lambda/4 flat
< 30" parallel
We have crystals of different cuts and sizes available in stock that can be quickly AR coated for required wavelength and metallized if necessary.
