Method for producing an optical fiber and optical fiber

Details Method for producing an optical fiber and optical fiber Method for producing an optical fiber and optical fiber

2006-04-18

2006-04-18

Palmer, Phan T. H. (Department: 2874)

Glass manufacturing

Processes of manufacturing fibers, filaments, or preforms

Process of manufacturing optical fibers, waveguides, or...

C065S385000, C065S391000, C065S388000, C065S412000, C065S434000, C065S435000, C385S123000

Reexamination Certificate

active

07028508

ABSTRACT:
In the known method for producing an optical fiber, a coaxial arrangement comprising a core rod and an outer jacket tube is elongated, the coaxial arrangement being supplied in a vertical orientation to a heating zone and being softened therein zonewise, starting with the lower end thereof, and the optical fiber being withdraw downwards from the softened portion, whereby an annular gap existing between core rod and jacket tube is collapsed. Starting therefrom, in order to provided a method which makes it possible to produce optical fibers with a minimum curl and at low costs, the invention suggests that a quartz glass cylinder treated mechanically to its final dimension and having an outer diameter of at least 100 mm should be used as the jacket tube. An optical fiber obtained according to the method is characterized in that without the action of external forces it assumes a radius of curvature of at least 6 mm.

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