These tubes have a lower refractive index than high purity silica tubes (above) and a lower viscosity. Typical applications include viscosity adjustments, to manipulate the stress in the fiber. Alternatively, because of the different refractive index tubes can serve as cladding for specialty fiber preforms, pump cladding for fiber lasers or as components to produce photonic crystal fiber preforms.
More information on specialty fiber preforms
More information on fiber lasers
Tubes are available with a uniform doping level, or may have a multiple layer construction of doped and undoped fused silica.
In addition to the different optical and mechanical properties, you can get these tubes in non-circular form or shape, e.g. with rectangular or hexagonal cross sections.
The possibilities are plentifold. For additional information, please have a look at our datasheet or contact our experts.