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Применить Всего найдено 3. Отображено 3.
09-11-2004 дата публикации

Treating an optical fiber preform with carbon monoxide

Номер: US0006813908B2
Автор: Kintu O. Early, Claude E. Lacy, Susan L. Schiefelbein, Sabyasachi Sen, Wanda J. Walczak, Joseph M. Whalen, Tiffany L. James, Hazel B. Matthews, Chukwuemeka B. Onuh, EARLY KINTU O, LACY CLAUDE E, SCHIEFELBEIN SUSAN L, SEN SABYASACHI, WALCZAK WANDA J, WHALEN JOSEPH M, JAMES TIFFANY L, MATTHEWS HAZEL B, ONUH CHUKWUEMEKA B, EARLY KINTU O., LACY CLAUDE E., SCHIEFELBEIN SUSAN L., WALCZAK WANDA J., WHALEN JOSEPH M., JAMES TIFFANY L., MATTHEWS HAZEL B., ONUH CHUKWUEMEKA B.
Принадлежит: Corning Incorporated, CORNING INC, CORNING INCORPORATED

The invention includes inventive methods of treating a soot preform. One method includes heating a soot preform to a temperature of less than about 1000° C. and exposing the preform to a substantially halide free reducing agent. Preferred reducing agents include carbon monoxide and sulfur dioxide. Another inventive method of treating the preform includes exposing the preform, in a furnace, to a substantially non-chlorine containing atmosphere comprising carbon monoxide. The preform is heated to a temperature of at least about 1000° C. Preferably this method is incorporated into the process for making an optical fiber. An additional method of treating the preform includes doping the preform with fluorine and exposing the fluorine doped preform to a substantially chlorine free atmosphere comprising at least carbon monoxide at a temperature of at least 1100° C., thereby reacting excess oxygen present in the furnace.

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Номер записи: 1
24-12-2004 дата публикации

METHODS AND APPARATUS FOR THERMAL TREATMENT OF A GLASS OPTICAL FIBER DURING DRAWING

Номер: KR20040108764A
Автор: FOSTER JOHN D., HAWTOF DANIEL W., LACY CLAUDE E., PENG YING LISA, POWERS DALE R., TARPLEE JENNIFER L., MATTHEWS HAZEL B., MIECZKOWSKI DANIEL, QUINN RICHARD A., WALCZAK WANDA J.
Принадлежит:

A method for forming an optical fiber includes drawing at a high draw rate, e.g. preferably > 10m/s the optical fiber from a glass preform and treating (annealing or slow cooling) the fiber by maintaining the optical fiber within a treatment temperature range for a short treatment time, e.g. < 0-5 s. Preferably the fiber is cooled at a specified cooling rate of > 830 °C/s and < 4000 °C/s.The optical fiber treatment reduces the tendency of the optical fiber to increase the attenuation due to Rayleigh scattering, and/or over time following formation of the optical fiber due to heat aging.Apparatus are also provided and comprise a muffle or heat- aging tube immediately downstream of the draw furnace exit, preferably attached there to and sealed to prevent entry of ambient air.Means for supplying gas, e.g. He, to the draw furnace and another gas, e.g Ar and N2 to the muffle or heat-aging tube for annealing or slow cooling the draw fiber. © KIPO & WIPO 2007 ...

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Номер записи: 2
04-07-2002 дата публикации

Treating soot preforms with a reducing agent

Номер: CA2432729A1
Автор: Chukwuemeka B Onuh, Claude E. Lacy, Hazel B Matthews, Susan L Schiefelbein, Tiffany L James
Принадлежит: Corning Inc

A silica soot preform (12) is inserted into a furnace (30). The preform is then treated with heat and carbon monoxide gas (32) so as to reduce impurities that could effect the final product.

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Номер записи: 3