Method for stretching refractory bodies

Details Method for stretching refractory bodies Method for stretching refractory bodies

1997-04-15

1998-12-15

Palmer, Phan T. H.

Optical waveguides

Optical fiber waveguide with cladding

385141, 385124, 65385, G02B 602

Patent

active

058504974

ABSTRACT:
A refractory body having reduced optical attenuation, and a method for making same, is disclosed. A refractory body is exposed to a high-temperature oxygen-containing plasma. A drawing force is applied to the body, elongating the body to form a rod of reduced diameter. The source of the plasma is moved in a direction opposite to the applied drawing force, and, preferably, has a reciprocating component of motion to spread the zone of heating. The method is particularly useful in manufacturing optical fiber core rods having low optical attenuation.

REFERENCES:
patent: 4341441 (1982-07-01), Lighty et al.
patent: 4909816 (1990-03-01), MacChesney et al.
patent: 5320660 (1994-06-01), Breuls et al.
patent: 5444808 (1995-08-01), Shackleton et al.
patent: 5578106 (1996-11-01), Fleming, Jr. et al.

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