The fluorine-doped quartz tube is characterized by high fluorine concentration. The high fluorine concentration makes the sag refractive index reach -26×10-3. Our fluorine-doped quartz tube is characterized by a higher fluorine content and therefore a low refractive index in the market. They can be made into multi-layer composite tubes with polygonal structures, such as the pump cladding of a fiber laser core rod.

Typical applications include:

Polygonal multi-layer composite tubes are used to manufacture laser fiber pumped fluorine-doped capillaries, for example, for optical and viscosity matching