Lithium Niobate Photonic Wafers

Product Description

Lithium Niobate (LiNbO3) is an extremely versatile nonlinear crystal material. Its electro-optic and nonlinear optical coefficients are used for various photonic applications. Titanium indiffused or annealed proton exchange waveguides can be fabricated in LiNbO3 for integrated optical applications. Fast optical switches are commercially manufactured with Deltronic Crystal’s lithium niobate wafers. Electro-optically controlled multiplexers and de-multiplexers can be fabricated into lithium niobate wafers. Three-inch diameter wafers are typically produced by Deltronic Crystal for integrated photonic applications.

Applications

  • EO Waveguide Phase Modulators
  • EO Waveguide Amplitude Modulators
  • Integrated Waveguide Photonics
  • Quasi-phasematching SHG and OPO
  • Waveguide Lasers

Features

  • Excellent Electro-optic and Nonlinear Optical Coefficients
  • Optical Grade Grown by Czochralski Method

 

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Property at 25°C Value
Empirical Formula LiNbO3
Congruent Melt Composition 48.6 mole % Li2O
Congruent Melting Point (°C) 1253
Crystal Structure trigonal
Bandgap (eV) 3.7
Point Group 3m
Curie Temperature (°C) 1143
Density (g-cm-3) 4.659
Hardness (moh) 5
Thermal Expansion Coefficient (°C-1) a = 16.7x10-6
c = 2.0 x 10-6
Resistivity (ohm-cm) > 1014 at 200°C
Lattice Constant (Å) a = 5.14829 (hex)
c = 13.8631 (hex)
Spontaneous Polarization (Coul/m2) 0.71
Dielectric Constants ås33 = 29 ås11 = 44
ås33 = 30 åT11 = 84
Refractive index, 514.5nm no = 2.2099, ne = 2.1476
Refractive Index, 633nm no = 2.2884, ne = 2.2019
Refractive Index, 1064nm no = 2.2340, ne = 2.1554
Electro-optic Coefficients at 633nm r13 = 9.6 r22 = 6.8 r33 = 30.9
[pm/V] (constant tension) r51 = 32.6 rc = 21.1

 

Crystallographic Orientations, Dimensions, and Tolerances
Orientations X, Y or Z
Diameters Up to 4 inches
Flatness 5µm
Orientation 6 minutes
Surface Quality <10/5 µm (scratch/dig) 1st Surface
20-30 2nd Surface
Thickness Variation <5µm
Index Uniformity 1 part in 10-5
Compositional Uniformity 0.02 mole%