MANUFACTURING METHOD FOR AN OPTICAL FIBRE PREFORM WITH A NON CIRCULAR CORE AND A DOPED CLADDING HAVING A PREDETERMINED NUMERICAL APERTURE

摘要

The invention relates to an optical conductor perform comprising a non circular fibre core and at least one cladding. The cladding has fluorine content. The content is increased in comparision with that of the fluorine content of an optical conductor perform comprising a circular fibre core with equal aperture.