Almaz Optics, Inc.
12 Chadsford Ct.  Marlton, NJ 08053, USA
Tel:  856 797-0491, Fax: 856 797-0228
e-mail: mail@almazoptics.com

 

































LITHIUM TANTALATE, 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. LiTaO3 crystals grown along X-axis, fully poled, maximum size 60 mm diameter and length are available as alternative material for  E-O modulators, pyroelectric sensors, etc.

Material Properties

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/gC

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