Apparatus and method for manufacturing glass preforms for optical fibers
AssigneePrysmian S.p.A.
InventorStefano Grieco
Life of this patent
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Abstract
An apparatus for manufacturing glass preforms for optical fibers includes a reaction chamber surrounding a deposition region, a holding device for holding a target rod within said deposition region, one or a plurality of deposition burners positioned below said deposition region and configured to direct a high temperature flow of forming glass particles toward said target rod, a hood positioned opposite to the deposition burners with respect to said holding device and configured for discharging soot of un-deposited glass particles, said hood including at least one exhaust port provided at a first end portion thereof and side panels extending from a second end portion thereof toward said first end portion. At least a portion of the side panels of the hood is gas permeable.
Claims19
An apparatus for manufacturing glass preforms for optical fibers comprising:
- a reaction chamber surrounding a deposition region;
- a holding device for holding a target rod within said deposition region;
- one or a plurality of deposition burners positioned below said deposition region and configured to direct a high temperature flow of forming glass particles toward said target rod;
- a hood positioned opposite to the deposition burners with respect to said deposition region and configured for discharging soot of un-deposited glass particles, said hood comprising at least one exhaust port provided at a first end portion thereof and side panels extending from a second end portion thereof toward said first end portion;
- wherein at least a portion of the side panels of the hood is gas permeable and
- wherein the apparatus comprises a control device for adjusting the degree of permeability of the gas permeable portion.
A method for manufacturing glass preforms for optical fibers comprising:
- providing a reaction chamber surrounding a deposition region;
- holding a target rod within said deposition region;
- directing a high temperature flow of forming glass particles toward said target rod;
- providing a hood comprising side panels and an exhaust port for discharging to outside said reaction chamber glass particles not adhered to said target rod;
- providing said side panels with gas permeable portions extending for an area of at least 50% of the overall area of said side panels;
- maintaining the pressure inside the reaction chamber lower than the pressure outside the reaction chamber;
- adjusting a degree of permeability of said gas permeable portions of the side panels.
Dependencies are inferred from the claim text.