Method of protecting a hollow preform for optical fibres

Details Method of protecting a hollow preform for optical fibres Method of protecting a hollow preform for optical fibres

C - Chemistry, Metallurgy

03

B

C03B 37/012 (2006.01) C03B 37/014 (2006.01) C03B 37/018 (2006.01) C03B 37/027 (2006.01)

Patent

CA 2389152

Disclosed is a method of minimizing re-wetting of a preform upon removal of the preform from the consolidation furnace and producing core cane and/or optical fiber therefrom. During removal, the consolidated preform and, in particular, the centerline aperture is exposed to a heavy inert gas, such as Argon, Krypton or Xenon. This reduces the amount of re-wetting thereby concomitantly improving attenuation of the optical fiber produced therefrom. This method produces beneficial attenuation reductions in the 1383 nm wavelength region.

L'invention concerne un procédé destiné à minimiser le remouillage d'une préforme lors du retrait de la préforme du four de consolidation et à produire une tige d'ébauche et/ou une fibre optique. Lors du retrait, la préforme consolidée et, en particulier, l'ouverture située sur l'axe central, est exposée à un gaz lourd inerte, tel que l'argon, le krypton ou le xénon. Cela réduit la quantité de remouillage, améliorant en même temps l'atténuation de la fibre optique produite par ce procédé. Cette méthode produit des réductions d'atténuation bénéfiques dans la zone de longueur d'onde de 1383 nm.

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