Lithium Niobate Crystal Description
Lithium Niobate Crystal is an inorganic material, and a negative crystal with piezoelectric, ferroelectric, photoelectric, nonlinear optical, and thermoelectric properties. It has an optical refractive effect. It is a good piezoelectric conversion material. As an electro-optical material in optical communication, it is widely used in parametric oscillators, double frequency, acoustic and optical devices, and optical modulators. The doping of MgO can effectively improve the damage resistance valve value of the crystal.
Lithium Niobate Crystal Specification
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Grade:
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Optical grade LiNbO3
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SAW grade LiNbO3
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Orientation
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X-cut, Z-cut （+/-0.2°）
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Z-cut, Y-cut,
Y-cut 36° off, Y-cut 64° off, Y-cut 128° off
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Primary Orientation Flat
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22mm+/-2mm (3-inch)
32mm+/-2mm (4-inch)
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22mm+/-2mm (3-inch)
32mm+/-2mm (4-inch)
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Standard Size
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φ3"(76.2mm) +/-0.3mm
φ4" (100mm) +/-0.3mm
φ6" (150mm) +/-0.3mm
10x10mm +/-0.1mm
Or others
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φ3" (76.2mm) +/-0.3mm
φ4" (100mm) +/-0.3mm
φ6" (150mm) +/-0.3mm
10x10mm +/-0.1mm
Or others
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Thickness
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500μm +/-20μm
1000μm +/-20μm
350μm +/-20μm
Or Ultra thin wafer 20~60μm
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500μm +/-20μm
1000μm +/-20μm
350μm +/-20μm
Or Ultra thin wafer 20~60μm
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Polishing
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Single or Both side polished
Surface Finish: 20/10 or 10/5
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Single or Both side polished
Surface Finish: 20/10 or 10/5
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TTV
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≤10um
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≤10um
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Curie temperature
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1142℃ +/-0.7℃
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1142℃ +/-3℃
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Edge chamfer
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Edge rounding
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Edge rounding
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Main Properties
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Crystal Structure
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Trigonal
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Lattice constant
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a=0.515Å, c=13.863Å, Z=6Å
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Melting Point
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1250±5℃
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Curie Point
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1140±5℃
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Mohs Hardness
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5
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Density
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4.64 g/cm3
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Dielectric Constant
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ε11/ε0=85; ε33/ε0=29.5
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Thermal Expansion Coefficient
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a1=a2=2×10-6/℃, a3=2.2×10-6/℃ at 25℃
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Thermal Conductivity
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38 W /m /K @ 25℃
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Transmission range
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370-5000nm
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Piezoelectric constant
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d22=2.04×10-11C/N, d33=0.6×10-11C/N, d15=7×10-11C/N, d31=-0.1×10-11C/N
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E-O Coefficient
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gT33=32pm/V, gS33=31pm/V；gT31=10pm/V, gS31=8.6pm/V
gT22=6.8pm/V, gS22=3.4pm/V
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Refractive Indices
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no=2.2827±0.0003 ne=2.1928± 0.0003
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Optical Properties
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Size
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4”, 6”
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Wafer Thickness
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0.25, 0.35, 0.50mm, or customized
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Orientation
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Y42°/Y36°/Y128°/X/Y/Z, or customized
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Surface Process
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Single/Double Sides Polishing
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TTV
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<10um
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BOW
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±(25um~40um)
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Warp
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≤35um
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Roughness
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Ra≤10Å
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Chamfer
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≤0.1mm@45°
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Lithium Niobate Crystal Applications
- Used in interdigital transducers, EO, pyroelectric IR detectors, etc.
- Used as a substrate material for RF surface acoustic wave (SAW) filters.
- Used in linear optics, motion detectors, and cell phones for their optical, piezoelectric, and pyroelectric properties.
Lithium Niobate Crystal Packaging
Our Lithium Niobate Crystal is carefully handled during storage and transportation to preserve the quality of our product in its original condition.
Lithium Niobate Crystal FAQs
Q1 What are the key properties of Lithium Niobate Crystals?
- High electro-optic coefficient
- Excellent piezoelectric and nonlinear optical properties
- Wide transparency range (400 nm to 5 µm)
- High thermal stability and mechanical strength
- Low optical loss and high damage threshold for lasers
Q2 Can Lithium Niobate Crystals be customized for specific applications?
Yes, Lithium Niobate Crystals can be customized in terms of size, thickness, surface finish, and orientation to meet the specific needs of your application.
Q3 What is the difference between doped and undoped Lithium Niobate Crystals?
- Undoped Lithium Niobate: Standard material with excellent optical and acoustic properties.
- Doped Lithium Niobate: Enhanced properties for specialized applications, such as increased photorefractive resistance or specific wavelength absorption.
