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US 6,735,985 B2Granted
Method of impressing a twist on a multimode fiber during drawing
AssigneeFurukawa Electric North America, Inc.
InventorsDavid John DiGiovanni, Frank Vincent DiMarcello, XinLi Jiang, George E. Oulundsen, Sandeep Prabhakar Pandit
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Abstract
The specification describes a technique for drawing circular core multimode optical fiber using twist during draw to increase fiber bandwidth.
Claims11
A method for the manufacture of multimode optical fiber comprising the steps of:
- (a) preparing a multimode optical fiber preform, the preform having a core and a cladding with the core of the preform having:
- i. a radially varying refractive index, and
- ii. an essentially circular cross section,
- (b) heating the preform,
- (c) drawing an optical fiber from the preform, the optical fiber having:
- i. an essentially circular core, and
- ii. a core diameter greater than 30 microns,
- (d) twisting the drawn optical fiber during step (c).
5 more elements
Dependencies are inferred from the claim text.