Unit for protecting a metal tube containing at least one optical fiber against internal overheating, and a method of implementing it

摘要

The unit for protecting the inside of a metal tube containing at least one optical fiber against overheating limits the extent to which fibers inserted by an auxiliary tube and filler gel overheat level with the laser welding that closes the metal tube. The unit including a thermal diffuser interposed between the auxiliary tube for inserting fibers and the closure zone that is defined on the metal tube. The invention is applicable to making an underwater optical cable.