Method for producing an optical fiber having low polarization mode dispersion
AssigneePrysmian Cavi E Sistemi Energia S.R.L.
InventorsFranco Cocchini, Andrea Mazzotti
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Abstract
A method for producing an optical fiber having low polarization mode dispersion, by the steps of a) providing an optical fiber perform of glass material; b) heating the glass material of an end portion of the optical fiber perform; c) drawing the heated glass material at a drawing speed V to form an optical fiber, the drawn glass material having a viscous zone; and d) applying to the optical fiber a substantially sinusoidal spin, which is transmitted to the viscous zone, the spin function frequency ν , the viscous zone length L and the drawing speed V being such that both a torsion and at least a 50% detorsion are applied to the viscous zone.
Claims8
1-7. (canceled)
A method for producing an optical fiber having low polarization mode dispersion, comprising the steps of
- a) providing an optical fiber preform of glass material;
- b) heating the glass material of an end portion of the optical fiber preform;
- c) drawing the heated glass material at a drawing speed V to form an optical fiber, the drawn glass material having a viscous zone;
- and
- d) applying to the optical fiber a substantially sinusoidal spin, which is transmitted to the viscous zone;
- the spin function frequency ν, the viscous zone length L and the drawing speed V being such that both a torsion and at least a 50% detorsion are applied to the viscous zone.
Dependencies are inferred from the claim text.