Heraeus Holding GmbH
Heraeus - Highly Fluorine Doped Tubes
Fluosil tubes are characterized by the unique high fluorine concentration, which leads to a depressed index of refraction up to -26 x10-3. Our Fluosil tubes feature the highest fluorine content and therefore the lowest refractive index in the market. They can be manufactured as homogenous single layer as well as multiple layer composite tubes with a polygonal structure e.g.as pump cladding for fiber laser core rods.
Most popular related searches
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Two different types of Fluosil® tubes are available: Composite tubes with fluorine doped layers on a substrate tube or solely fluorine doped tubes.
Uniformly fluorine doped Fluosil® tubes, referred to as U-types (TWU, TTU, TXU and TNU), are available. In addition, tubes are available with a double or multi step refractive index profile. These types are referred to as S-types (TWS, TTS, TXS and TNS). When using the soft fluorine doped tubes in MCVD or similar processes, stabilization of the tube can be achieved by adding an un-doped outer layer.
Typical geometries
- Outer tube diameter: 10 … 40 mm
- Fluorine doped wall thicknesses: 2 … 3 mm
- Lengths: Up to 1,300 mm
Other custom geometries available on request
Special tube cross sectionsBeyond the standard cylindrical tube geometry, we also offer Fluosil® tubes with polygonal cross sections suchas rectangular, square or hexagonal. Rectangular Fluosil® tubes can have aspect ratios from 1:1 to as high as 1:6.