LVF Catalog

Fluoride Glass Fibers

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Active Fibers

Active fibers

Hundreds of active fibers in stock

Since the discovery of ZBLAN glasses in 1974, Le Verre Fluoré has worked to develop a large range of fluoride optical fibers, including ZrF4, InF3 and AlF3 based optical fibers, designed for mid infrared applications.

Our fluoride fibers can be separated in three main categories :

ZFG (Zirconium ZrF4 Fluoride Glass) = fluorozirconate fibers
Exhibit a high transparency from 0.3 up to 4.5µm (see graph below)

IFG (Indium InF3 Fluoride Glass) = fluoroindate fibers
Exhibit a high transparency from 0.3 up to 5.5µm (see graph below)

AFG (Aluminium AlF3 Fluoride Glass) = fluoroaluminate fibers, generally used for end-capping solutions. Contact us to know more about AFG.

Multimode fibers

Cut-back background losses:

  • ZFG: Typ < 10dB/km at 2560nm
  • IFG: Typ < 10dB/km at 3670nm

Operating wavelengths (<1dB/m):

  • ZFG: 0.32-4.3µm
  • IFG: 0.335-5.3µm

Thanks to their high rare earth solubility (Er, Ho, Tm, Dy, Pr, Yb, Nd, Ce, Sm… up to 100 000 ppm) and low phonon energy, dozens of transitions are active in fluoride glasses. As a result, combined to their high transparency, fluoride fibers are used to generate lasers in mid-infrared range, but also in visible range.

Those fibers can be drawn in many kind of designs depending on your needs, click on the category you are interested in to find out more :