Procedimiento para la fabricación de una preforma de fibra óptica

摘要

A method of fabricating an optical fiber preform that comprises, from the center towards the periphery, a central core, intermediate cladding, a buried trench, and outer cladding, the method comprising the steps of: · prepaying a first rod constituting at least the central core, the first rod being prepared by chemical vapor deposition (CVD) in a first tube; · prepaying a hollow second rod constituting at least the buried trench, the second rod being prepared by chemical vapor deposition (CVD) in a second tube; and · fitting the second rod as a sleeve on the first rod. Such a method serves to fabricate large-capacity fiber preforms while using deposition benches of small and/or medium deposition capacity.