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

1986-08-04

1988-04-12

Lindsay, Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 13, C03B 37018

Patent

active

047371790

ABSTRACT:
A method for producing a glass preform for use in fabrication of an optical fiber, which comprises steps of forming a cylindrical rod of glass having a refractive index distribution with axial symmetry around the rod axis by an VAD method, stretching the rod glass to decrease its diameter, inserting the stretched rod in a glass tube having a refractive index distribution with axial symmetry around the tube axis and heating and melting a complex of the stretched rod and the tube to integrate them from the glass preform produced by the method, an optical fiber having precisely controlled refractive index distribution can be fabricated.

REFERENCES:
patent: 4123483 (1978-10-01), Nakahara et al.
patent: 4610709 (1986-09-01), Kawauchi et al.

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