Quartz fibre with hydrogen barrier layer and method for the production thereof
AssigneeJ-Fiber GmbH
InventorWolfgang Haemmerle
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Abstract
A method of manufacturing a quartz glass fibre includes producing a quartz glass primary preform by modified chemical vapor deposition (MCVD) in a quartz glass substrate tube and inserting the quartz glass primary preform into a glass jacketing tube. Defect-generating UV radiation is irradiated into the cross-sectional area of the glass jacketing tube while combining the quartz glass primary preform with the glass jacketing tube in the jacketing process to form a cladding layer to a secondary preform. A quartz glass fibre is pulled from the secondary preform.
Claims9
A method of manufacturing a quartz glass fibre, said method comprising the steps of:
- a) producing a quartz glass primary preform by modified chemical vapor deposition (MCVD) in a quartz glass substrate tube;
- b) inserting the quartz glass primary preform with a fluorine-doped radial layer on the fibre core into a glass jacketing tube containing chlorine,
- c) irradiating defect-generating ultra-violet (UV) radiation into the cross-sectional area of the glass jacketing tube while combining the quartz glass primary preform with the glass jacketing tube in the jacketing process to form a cladding layer on the fibre core to a secondary preform, wherein the cladding layer defines a hydrogen barrier around the fibre core in response to irradiation of the glass jacketing;
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- d) pulling a quartz glass fibre from the secondary preform.
A method of manufacturing a quartz glass fibre, said method comprising the steps of:
- a) producing a quartz glass primary preform by modified chemical vapor deposition (MCVD) in a quartz glass substrate tube;
- b) inserting the quartz glass primary preform with a fluorine-doped radial layer on the fibre core into a glass jacketing tube containing chlorine,
- c) irradiating defect-generating ultra-violet (UV) radiation into the cross-sectional area of the glass jacketing tube while combining the quartz glass primary preform with the glass jacketing tube in the jacketing process to form a cladding layer on the fibre core to a secondary preform, wherein the glass jacketing tube includes an axial end surface upstream of where the quartz glass primary preform is combined with the glass jacketing tube and the defect-generating UV radiation is irradiated into the axial end surface;
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- d) pulling a quartz glass fibre from the secondary preform.
A method of manufacturing a quartz glass fibre, said method comprising the steps of:
- a) producing a quartz glass primary preform by modified chemical vapor deposition (MCVD) in a quartz glass substrate tube;
- b) inserting the quartz glass primary preform with a fluorine-doped radial layer on the fibre core into a glass jacketing tube containing chlorine,
- c) irradiating defect-generating ultra-violet (UV) radiation into the cross-sectional area of the glass jacketing tube while combining the quartz glass primary preform with the glass jacketing tube in the jacketing process to form a cladding layer on the fibre core to a secondary preform, wherein only the glass jacketing tube is irradiated with defect-generating radiation;
- and
- d) pulling a quartz glass fibre from the secondary preform.
Dependencies are inferred from the claim text.