Leverre Fluoride Fibers

Le Verre Fluoré has developed a broad range of fiber optic fluoride fibers intended for applications using electromagnetic radiation in the mid-infrared range.

Fluoride fibers
Mid-infrared
High light transmission (0.22 to 8 µm)
Coverage of the 3-5 µm atmospheric window
ZFG and IFG types

Leverre Fluore Fluoride Fibers

Le Verre Fluoré has developed a broad range of fiber optic fluoride fibers intended for applications using electromagnetic radiation in the mid-infrared range.

Since the discovery of ZBLAN glasses in 1974, Le Verre Fluoré has developed a broad range of fiber optic fluoride fibers intended for applications using electromagnetic radiation in the mid-infrared range.
These fibers are based on the compounds ZrF₄, InF₄ and AlF₃, distinguishing two types of fiber:

0.53 ZrF₄– 0.2 BaF₂– 0.4 LaF₃– 0.3 AlF₃– 0.2 NaF

0.4 InF₃– 0.2 ZnF₂– 0.2 SrF₂– 0.2 BaF₂
Fluoride fibers feature a high level of light transmission from UV to mid-infrared: from 0.22 to 7 µm for ZFG glass and from 0.255 to 8 µm for IFG glass. As a result, glasses of this type fully cover the 3-5 µm atmospheric window.

The properties of ZFG and IFG glasses are presented below, along with a comparison to the properties of chalcogenide glasses and silica glass.

Property	ZFG	IFG
Glass transition temperature T_g (°C)	250-300	280-320
Density (g/cm³)	≈ 4.5	≈ 5
Refractive index nD	≈ 1.50 - 1.51	≈ 1.48 - 1.51
Nonlinear refractive index n2 (x 10-20 m²/W)	≈ 2.1	≈ 3.2 - 4.3
Phonon energy (cm^-1)	≈ 580	≈ 510

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Leverre Fluoride Fibers

Leverre Fluore Fluoride Fibers

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