The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 31, 1999
Filed:
Feb. 19, 1998
Jose Chesnoy, Paris, FR;
Jean-Yves Boniort, Limours, FR;
Andre Tardy, Egly, FR;
Claude Brehm, Montrouge, FR;
Pierre Sansonetti, Palaiseau, FR;
Alcatel Fibres Optiques, Bezons Cedex, FR;
Abstract
A method of manufacturing a multi-core optical fiber, the method including assembling together a plurality of substantially identical single-core optical fiber preforms (2', 2'), referred to as 'single-core preforms', each of which includes a core bar (3) surrounded by a layer of optical cladding (4), so as to form a 'multi-core preform' (10) and drawing down the multi-core preform (10) so as to obtain the multi-core optical fiber. The assembly step includes securing the single-core preforms (2', 2') to one another by fusing them over their entire lengths or over portions thereof along their tangential lines of contact (T), without inserting the multi-core preform (10) into a holding tube. A vacuum is maintained in the preform during the drawing step, the vacuum being formed before or during the drawing step.