Optics
Lithium Niobate Wafers
Use Lithium Niobate's unique combination of high refractive index and visible and infrared transmission to makes waveguides, modulators, and sensors on our wafers.
Lithium niobate is a multifunctional material with high chemical and heat stability. Its high refractive index (>2.3) compared with glass (1.5) enables a large field-of-view when fabricated in wafer form for waveguide design.
Lithium Niobate Wafer
Depend on Coherent, with over a decade of experience in Lithium Niobate wafer manufacturing, to provide wafers that meet your exact requirements.
Material Specifications |
|
Material |
Congruent: LiNbO3 |
Material quality |
Bubble or inclusion <100 μm Qty <8, 30 μm < bubble size < 100 μm |
Orientation |
Y cut ±0.2° |
Density |
4.65 g/cm3 |
Curie temperature |
1142 ±1℃ |
Transparency |
>95% for 10 mm thickness over 450 - 700 nm |
Fabrication Specifications |
|
Diameter |
150 mm ± 0.2 mm |
Thickness |
350 μm ± 10 μm |
Flatness Total thickness variation(TTV) Local thickness variation (LTV) Bow Roughness |
<1.3 μm Warp < 70 μm @ 150 mm wafer <70 μm @ 150 mm wafer Rq ≤0.5 nm (RMS value by AFM) |
Surface quality |
40-20 |
Particles |
Non-removable particles: 100-200 μm ≤3 particles, 20-100 μm ≤20 particles |
Chip |
<300 μm (full wafer, without exclusion zone) |
Crack |
No crack (full wafer) |
Contamination |
No non-removable stain (full wafer) |
Parallelism |
<30 arc second |
Orientation refer flat (x-axis) |
47 ±2 mm |
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Optical Manufacturing Capabilities
Learn about the vertically integrated capabilities for material growth, fabrication, coating, and assembly, and rigorous QA at Coherent. Discover how these ensure the performance and reliability of our optics and minimize supply chain risks and uncertainties.
