Lower-loss base material for optical fibres and...

Details Lower-loss base material for optical fibres and... Lower-loss base material for optical fibres and...

C - Chemistry, Metallurgy

03

B

C03B 37/016 (2006.01) C03B 37/014 (2006.01) C03B 37/018 (2006.01)

Patent

CA 2430103

A method for manufacturing a base material of optical fibres having a desired ratio of core to clad, including forming a porous base material upon depositing glass particles, producing a core member upon dehydrating and vitrifying the porous base material, adding a clad member onto the core member, is characterized in that the method includes, a step of dehydrating the porous base material in an atmosphere of gas including helium and chlorine within an electric furnace; a step of vitrifying the porous base material in an atmosphere of inert gas including helium; and a step of providing a purging step of heating the porous base material in an atmosphere of inert gas mainly including helium between the dehydrating step and the vitrifying step.

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