Iron Doped Lithium Niobate

Product Description

Deltronic Crystal’s Iron-Doped Lithium Niobate is one of the most preferred photorefractive materials due to its superior photorefractive properties.
 
Iron-Doped Lithium Niobate is a ferroelectric crystal with the paraelectric to ferroelectric phase transition around 1143 C°. Boules are electrically poled along the Z-axis to align antiparallel domains of the spontaneous polariztion.
 
Deltronic Crystal regularly grows large diameter boules of iron-doped lithium niobate for photorefractive applications. Lithium niobate is chemically stable at room temperature and is generally non-reactive to most solvents.

 

Applications

  • Astronomical Filters
  • Spectroscopic Filters
  • Holographic Applications
  • Holographic Data Storage
  • Wavelength Division Multiplexing

 

Features

  • Strong Photovoltaic Effects
  • High Electro-optic Coefficients
  • High Photorefractive Sensitivity
  • High Diffraction Efficiency
  • Grown by Czochralski Method

PDF of this product overview

 

Property at 25°C Value
Empirical Formula LiNbO3:Fe
Congruent Melt Composition 48.6 mole % Li2O
Congruent Melting Point (°C) 1253
Crystal Structure trigonal
Space Group R3c
Bandgap (eV) 3.7
Point Group 3m
Curie Temperature (°C) 1143
Density (g-cm-3) 4.612
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 = 5.1508 (hex)
c = 13.864 (hex)
Spontaneous Polarization (Coul/m2) 0.71
Dielectric Constants ås33 = 29 ås11 = 44
ås33 = 30 åT11 = 84
Refractive index, 514.5nm no = 2.2029, 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
Standard Sizes 10x10x10mm3, 0° cut and 45° cut
10x10x20mm3, 0° cut and 45° cut
Dimension Tolerances ±0.1mm on polished faces
±0.1mm on lapped faces
Orientations X-ray oriented within ±10 arc-minutes
Flatness <λ/10 at 633nm
Surface Quality <10/5 (scratch/dig)
Edges 0.1 to 0.15mm chamfer at 45°
Parallelism <10 arc-minutes
Anti-reflective Coatings Specify
Other Dopants Specify
Fe Standard Dopants 0.015, 0.03, 0.05, 0.10 mole%