Highly Fluorine Doped Rods
Heraeus has long produced fused silica materials with optimized optical properties for a broad range of specialty fiber applications. We have now successfully developed Fluosil® rods with a unique high fluorine concentration up to 7% in the fused silica network. This leads to a depressed index of refraction up to -26 x 10-3. Consequently, Fluosil® rods are extremely well suited for new fiber applications and preform designs.
Fluosil® rods can be the basis for new fiber types and can be used as starting material for photonic crystal fibers or other specialty fiber designs. Our rods are available in round as well as in shaped geometries.
Heraeus manufactures the base material needed for your fiber applications
Heraeus possesses a comprehensive knowledge and portfolio of base materials with optimized optical properties for preform production and related fiber draw applications. Therefore, we can help our customers determine the best fused silica materials for their applications and ultimately provide the material to meet these required specifications.Due to our long history of experience in this area, our base material products have been developed with consistent and tightly controlled optical properties. We also have been successful in producing base materials for large volumes while controlling costs for price-sensitive applications.
Physical Properties
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Fluorine content [ppm]
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0...70,000
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Refractive index*
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0...-23 x 10-3
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Numerical aperture (NA)**
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up to 0.26
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*Difference to un-doped fused silica (Heraeus standard)
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**In respect to un-doped fused silica (Heraeus standard)
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Rod geometries
Heraeus offers highly fluorine doped silica rods in a broad range of diameters. Standard rod diameters range from 1 mm up to 50 mm. Since rod diameters can be precisely adjusted to meet customers’ requirements, custom diameters are available upon request.
