Method for producing glass preform for optical fiber

Details Method for producing glass preform for optical fiber Method for producing glass preform for optical fiber

1992-06-23

1994-05-24

Lindsay, Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 312, 65 183, 65901, C03B 37023

Patent

active

053145186

ABSTRACT:
A glass preform for an optical fiber containing a dopant in a core portion at a high concentration is produced by providing a glass tube, forming a coating film of a sol-gel solution containing a dopant compound on an inner wall of the glass tube, vitrifying and collapsing the glass tube having the coating of the sol-gel solution to obtain a glass rod.

REFERENCES:
patent: 4141710 (1979-02-01), Aulich et al.
patent: 4675038 (1987-06-01), Ainslie et al.
patent: 5153940 (1992-06-01), DiGiovanni et al.
patent: 5154745 (1992-10-01), Le Sergent
DiGiovanni et al, "New optical fiber fabrication technique using sol-gel dipcoating", Optical Fiber Communication Conference, Technical Digest OFC '91, Feb. 18-22, 1991, WA2.

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