Doped by rare earths, these fibres effectively emit light in the bands of wavelength 850 nm, 1300 NM, 1460 NM, 2800 NM, etc…
The manufacture of fluorinated lenses for the design of optical fibres requires specific raw materials with a suitable purity level, independent of the usual standards.
That is why SUDFLUOR has developed an optical grade (OG series) for the products ZrF4, HfF4, AlF3 and some rare earth fluorides.
ZBLAN fluorinated optical fibres are composed of ZrF4/BaF2/LaF3/AlF3/NaF and transmit from visible to medium infra-red (4 μm). Doped by rare earths, these fibres effectively emit light in the bands of wavelength 850 nm, 1300 NM, 1460 NM, 2800 NM, etc. These features find applications in infra-red spectroscopy, but also in optical fiber amplifiers, fibers and laser guides.
AlF3-based fluorinated fibres
These are multi-component fluorinated fibres that have the main component of aluminum trifluoride. They provide lasers with a higher damage threshold and have better water resistance than ZBLAN fibers. Their transmission loss is less than that of GeO2-2.9 μm fibres.
These fibres are used globally as optical guides for laser processing equipment er-YAG 2.94 μm. They are also used as an optical guide in infra-red medium Spectroscopy for their transparency in a wide window between 0.3 and 3.5 μm.