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AssigneeCorning Incorporated
InventorsJames G. Anderson, Ernest E. Brand, Adam J. Ellison, Jackson P. Trentelman
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The disclosed invention includes a method of making an optical fiber drawn from a multiple crucible. The method includes moving a first crucible of the multiple crucible relative to a second crucible of the multiple crucible. The invention also includes minimizing core and cladding diffusion. A tip of the first crucible is disposed axially above a tip of the second crucible by a preselected distance. The invention further includes the ability to alter a diameter of the core of the fiber. A differential pressure is applied to the first crucible. A positive differential pressure is applied to increase the core diameter. A negative differential pressure is applied to decrease the core diameter. Furthermore, the invention includes drawing the fiber under non-isothermal conditions; there is a thermal gradient of at least 10° C./m between the two tips.
A method of drawing an optical fiber from a multiple crucible, the multiple crucible having at least a first crucible with a tip and a second crucible with a tip disposed below the first crucible, said method comprising:
The method of claim 5 further comprising forming a body of raw materials of core glass in the first crucible and a body of raw materials of cladding glass in the second crucible and heating both bodies of raw materials such that the each body has a viscosity of less than about 10,000 poises, and wherein the drawn fiber has a root with a viscosity of at least about 10,000 poises.
A method of making an optical fiber drawn from a multiple crucible, said method comprising:
Dependencies are inferred from the claim text.