Figure 1: Aluminium-core-silica-cladding preform drawn into silicon-core fibre.
From: Crystalline silicon core fibres from aluminium core preforms
(a) The schematic diagram of the drawing process. A macroscopic preform with an elemental Al core surrounded with silica is thermally drawn into a fibre with an elemental Si core and a silica cladding. (b) The optical image of the preform before the shiny Al core is sealed in the cladding. (c) The optical image of the drawn fibre with a black Si core. The core diameter is about 60 μm.
