Method for making a single-mode optical fibre and optical...

Details Method for making a single-mode optical fibre and optical... Method for making a single-mode optical fibre and optical...

C - Chemistry, Metallurgy

03

B

C03B 37/012 (2006.01) G02B 6/02 (2006.01)

Patent

CA 2235324

A single-mode preform (2) including a master preform (22) housed in an outer sleeve tube (20) is provided. An intermediate tube (21) between the master preform (22) and the outer tube (20) has a lower viscosity at the fibre drawing temperature than said master preform (22) and said outer tube (20). A method for making a single-mode optical fibre is also provided. The fibre has a more centred and less deformed core than in the prior art. By way of example, an optical amplifier may thus be produced.

L'invention fournit une préforme monomode (2) comprenant une préforme mère (22) logée dans un tube manchon externe (20). Elle est caractérisée en ce qu'elle comprend, en outre, entre la préforme mère (22) et ledit tube externe (20), un tube intermédiaire (21) qui possède une viscosité à température de fibrage qui est inférieure à une viscosité à température de fibrage desdits préforme mère (22) et tube externe (20). Elle fournit également un procédé de fabrication d'une fibre optique monomode. La fibre possède un coeur plus centré et moins déformé que dans la technique antérieure. Exemple d'application: réalisation d'un amplificateur optique.

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