Lithium Niobate (LiNbO3)
LiNbO3
Lithium Niobate (LiNbO3) possesses a combination of unique electro-optical, acoustic, piezoelectric, photoelastic and non-linear optical properties with exhibiting mechanical and chemical stability.
Lithium Niobate is strongly birefringent, lacks inversion symmetry and displays Pockels effect. Its birefringence is highly temperature dependent, that’s why accurate heating of the crystal can be used to achieve phase matching in the medium. It possesses large effective non-linear, electro-optic and acousto-optic coefficients.
Lithium Niobate is commonly used in electro-optical, acousto-optical and non-linear optical devices, Pockels cells, optical parametric oscillators, optical switches for gigahertz frequencies, high-temperature acoustic transducers, receivers-transmitters of acoustic vibrations, laser frequency doubling, Q-switching devices for lasers.
The transverse modulation is mostly employed for LiNbO3 crystal for using as frequency doubler for wavelength >1 µm and optical parametric oscillator (OPO) pumped at 1064 nm as well as quasi-phase-matched waveguide doublers.
Typical Applications/Devices for Lithium Niobate products:
SHG und OPO pumped by Nd:YAG laser
Electro-optical devices
SAW (surface acoustic wave) devices
Optical Property
Transmission Range, µm | 0.32 – 5.60 |
Refractive Index, at 1300 nm | ne = 2.146 |
Reflection Loss, % | 26.57 |
Optical Homogeneity, 1/cm | 5 x 10-5 |
NLO Coefficients, pm/V | d33 = 34.40 |
Damage Threshold, MW/cm2 at 10 ns | 200 |
Efficiency NLO Coefficients, pm/V | deff = 5.7 for frequency doubling 1300 nm |
Absorption loss, %/cm at 1064 nm | < 0.1 |
Physical Property
Density, g/cm3 | 4.64 |
Solublity | insoluble in H2O |
Type of Material | Single crystal, synthetic |
Crystal Structure | Trigonal, space group R3c |
Melting Point, +/- 5 °C | 1255 |
Thermal Conductivity, W/(m · K) at 25 °C | 38 |
Thermal Expansion, 1/°C at 25 °C | 2.0 x 10-6 |
Mohs Hardness, indenter load 600g | 5 |
Curie Point, +/- 5 °C | 1140 |
Relative Dielectric Constant, T11/e0: | 85.0 |
Relative Dielectric Constant, T33/e0: | 29.0 |
Absorption Coefficient, %/cm at 1064 | 0.1 |
Specific Heat Capacity, J/(kg · K) | 628 |
Dielectric Constant, at 100 KHz | εa = 85 |
Elastic Coefficient, GPa | C11 = 203.0 |
Spectral properties |
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