LiTaO3 Substrate

The chemical formula of lithium tantalate is LiTaO3, lithium tantalate crystal is colorless or yellowish crystal. LiTaO3 crystal is a ferroelectric crystal with excellent electro-optical, piezoelectric, electrical and pyroelectric properties. Use the pulling method to grow. The lithium tantalate crystal is used as a Q-switch in laser technology, as a pyroelectric detector in infrared technology, and can also be used to make filters and resonators.

OST Photonics offers high quality LiTaO3 crystal substrates for researchers and industries. Crystal orientation, size and thickness can be customized according to your requirements.

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Features

  • Stable mechanical properties

  • Stable chemical properties

  • High optical damage threshold

  • Good piezoelectric and pyroelectric properties

Applications

  • Quasi-phase matching for SHG and OPO

  • Optical modulators

  • RF type SAW devices

  • High frequency filters

  • pyroelectric detectors

Processing Capability

  • Orientation: X, Y, Z, X112Y, Y36, Y42, Y48, etc.

  • Dimension: 2”, 3”, 4”, 6”, 5x5mm, 10x10mm, 20x20mm, etc.

  • Thickness: 0.35mm, 0.5mm, 1.0mm, etc.

  • Available items: wafers, substrates, blanks and customized optics

Specification and properties of LiTaO3 Substrates

Crystal Structure

Trigonal, Space group R3c, Point group 3m

Lattice Constant

a=5.154 Å, c=13.781 Å

Melting Point

1650 ℃

Curie Temperature

603 ℃

Hardness

5.5 Mohs

Density

7.46 g/cm3

Dielectric Constants

ε11/ε0:51.7

ε33/ε0:44.5

Elastic Stiffness Coefficients

CE11:2.33(x10^11 N/m2)

CE33:2.77(x10^11 N/m2)

Piezoelectric Strain Constants

d22:2.4(x10^-11 C/N)

d33:0.8(x10^-11 C/N)

Transmission range

400-4500 nm

Electro-optical coefficients

r33=30.4 pm/V

Refractive index at 632.8nm

no=2.176, ne=2.180

Orientation

X, Y, Z, X112Y, Y36, Y42, Y48, etc.

Orientation Tolerance

±0.25°

Dimension

2”, 3”, 4”, 6”, 5x5mm, 10x10mm, 20x20mm, etc.

Dimension Tolerance

±0.2 mm or better

Thickness

0.35mm, 0.5mm, 1.0mm, etc.

Thickness Tolerance

±0.025 mm or better

Surface Finish

Single side polished (SSP)/Double sides polished (DSP)

Roughness

Ra≤5Å

Package

Class 100 clean bag, Class 1000 super clean room