| 摘要 |
A method of manufacturing an optical fibre, comprises: (i) forming a preform ( 10 ) for drawing into the fibre, the preform ( 10 ) comprising a bundle of elongate elements, ( 20,50 ) arranged to form a first region that becomes a cladding region of the fibre and a second region that becomes a core region of the fibre; (ii) drawing the preform ( 10 ) into the fibre. The bundle of elongate elements ( 20,50 ) comprises a plurality of elongate elements ( 20 ) of a lower purity dielectric material and at least one elongate element ( 50 ) of a higher purity dielectric material. The first region comprises a plurality of the lower purity elements ( 20 ) and the second region comprises the higher purity element ( 50 ).
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