Essential details
MOQ:10
Shipping:Air freight, land freight, sea freight
Product Code:CRY-05
Product Introduction
Product name: Lithium Niobate (LiNbO3) Crystal
Lithium niobate is a ferroelectric crystal that carries several useful effects at once: piezoelectric, electro-optic, nonlinear optical, photorefractive and acousto-optic. Almost every optical modulator, Q-switch and surface acoustic wave filter in service uses it or one of its doped variants.
Key properties:
The spontaneous polarisation is high, 0.70 C/m2, and the Curie temperature is high for a ferroelectric, so the crystal does not depole in normal device processing. Two things make it versatile: it shows many photoelectric effects in one material, and those properties are highly controllable through composition, doping and valence control. The crystal is available in large high-quality boules, is stable and easy to process, transmits from 0.3 to 5 µm, and has a birefringence of about 0.08 at 633 nm, which makes high-quality optical waveguides straightforward to produce.
The spontaneous polarisation is high, 0.70 C/m2, and the Curie temperature is high for a ferroelectric, so the crystal does not depole in normal device processing. Two things make it versatile: it shows many photoelectric effects in one material, and those properties are highly controllable through composition, doping and valence control. The crystal is available in large high-quality boules, is stable and easy to process, transmits from 0.3 to 5 µm, and has a birefringence of about 0.08 at 633 nm, which makes high-quality optical waveguides straightforward to produce.
That combination is why LiNbO3 devices appear across electronic technology, optical communication and laser technology:
SAW filters, optical and phase modulators, optical isolators, electro-optic Q-switches, integrated optical circuits, image storage, harmonic generation, frequency multipliers, parametric oscillators, 1064 nm frequency doubling and four-wave phase matching devices. Interest has grown again with 5G, micro- and nano-photonics, integrated photonics and quantum optics.
Fabrication and options:
Supplied as boules, crystal rods, blanks and polished wafers up to Ø8" with surface quality 10/5, flatness λ/8 at 632.8 nm, parallelism better than 10′, wavefront distortion below λ/4, chamfer under 0.5 mm at 45°±5°, and an extinction ratio above 400:1 at 633 nm over a 6 mm beam. Optical coating down to R < 0.2% at 1064 nm is available. Degrees of X, Y and Z cut, off-axis and periodically poled wafers can be produced on request. Packed in a Class 100 clean bag inside a Class 1000 clean room.
Supplied as boules, crystal rods, blanks and polished wafers up to Ø8" with surface quality 10/5, flatness λ/8 at 632.8 nm, parallelism better than 10′, wavefront distortion below λ/4, chamfer under 0.5 mm at 45°±5°, and an extinction ratio above 400:1 at 633 nm over a 6 mm beam. Optical coating down to R < 0.2% at 1064 nm is available. Degrees of X, Y and Z cut, off-axis and periodically poled wafers can be produced on request. Packed in a Class 100 clean bag inside a Class 1000 clean room.
Ordering:
Minimum order 10 pcs. For modulator and Q-switch work, send the cut, the aperture and the wavelength; coating and poling are quoted together with the wafer.
Minimum order 10 pcs. For modulator and Q-switch work, send the cut, the aperture and the wavelength; coating and poling are quoted together with the wafer.
Product Parameter：
Material | Lithium niobate, LiNbO3 single crystal (negative crystal, no > ne)
Growth method | Czochralski
Crystal structure | Trigonal
Lattice constant | a = b = 5.148 Å, c = 13.863 Å
Melting point | 1250 °C
Curie temperature | 1140 °C
Density | 4.64 g/cm3
Mohs hardness | 5
Transmission wavelength | 0.4-2.9 µm
Refractive index | no = 2.286, ne = 2.203 at 632.8 nm
Spontaneous polarisation | 0.70 C/m2
Nonlinear coefficient | d22 = 2.1, d31 = -4.5, d33 = -0.27 pm/V
Electro-optic coefficient | γ13 = 8.6, γ22 = 3.4, γ33 = 30.8, γ51 = 28.0 pm/V
Optical damage threshold | 250 MW/cm2 at 1064 nm, 10 ns
Transmittance | above 68% from 370 to 5000 nm
Thermal expansion | 2.0 × 10-6 /K along a; 16.7 × 10-6 /K along c
Absorption loss | below 0.1 %/cm at 1064 nm
Dimension | up to Ø8"
Surface quality | 10/5
Dimensional tolerance | Z axis ±0.3 mm; X and Y axis ±0.1 mm
Flatness | λ/8 at 632.8 nm
Chamfer | under 0.5 mm, 45° ± 5°
Coating | R < 0.2% at 1064 nm
Orientation accuracy | Z axis 5′; X and Y axis better than 10′
Wavefront distortion | below λ/4 at 633 nm
Parallelism | better than 10′
Extinction ratio | above 400:1 at 633 nm, 6 mm beam
Packing | Class 100 clean bag, Class 1000 clean room
Minimum order | 10 pcs
Growth method | Czochralski
Crystal structure | Trigonal
Lattice constant | a = b = 5.148 Å, c = 13.863 Å
Melting point | 1250 °C
Curie temperature | 1140 °C
Density | 4.64 g/cm3
Mohs hardness | 5
Transmission wavelength | 0.4-2.9 µm
Refractive index | no = 2.286, ne = 2.203 at 632.8 nm
Spontaneous polarisation | 0.70 C/m2
Nonlinear coefficient | d22 = 2.1, d31 = -4.5, d33 = -0.27 pm/V
Electro-optic coefficient | γ13 = 8.6, γ22 = 3.4, γ33 = 30.8, γ51 = 28.0 pm/V
Optical damage threshold | 250 MW/cm2 at 1064 nm, 10 ns
Transmittance | above 68% from 370 to 5000 nm
Thermal expansion | 2.0 × 10-6 /K along a; 16.7 × 10-6 /K along c
Absorption loss | below 0.1 %/cm at 1064 nm
Dimension | up to Ø8"
Surface quality | 10/5
Dimensional tolerance | Z axis ±0.3 mm; X and Y axis ±0.1 mm
Flatness | λ/8 at 632.8 nm
Chamfer | under 0.5 mm, 45° ± 5°
Coating | R < 0.2% at 1064 nm
Orientation accuracy | Z axis 5′; X and Y axis better than 10′
Wavefront distortion | below λ/4 at 633 nm
Parallelism | better than 10′
Extinction ratio | above 400:1 at 633 nm, 6 mm beam
Packing | Class 100 clean bag, Class 1000 clean room
Minimum order | 10 pcs
