C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
49/81
C03B 37/023 (2006.01) C03B 37/027 (2006.01)
Patent
CA 1271919
- 11 - PROCESS FOR FABRICATING OPTICAL FIBER ABSTRACT OF THE DISCLOSURE A process for fabricating an optical fiber for inner-lining a synthetic glass having a refractive index higher than a quartz tube on the inside of the quartz tube and collapsing it while wire- drawing it via a wire-drawing furnace comprising the steps of inner- lining the synthetic glass in the quartz tube so that the value of the inner diameter/the outer diameter of the quartz tube is 0.85 or less, then sealing one end of the quartz tube to form a sealed end, then holding the quartz tube in a wire-drawing furnace, and wire- drawing it from the sealed end while holding the internal pressure of the quartz tube in negative pressure. Thus, the process can pre- vent moisture from the exterior from mixing and can reliably and stably performing both the wire-drawing and collapsing steps.
512329
Kamiya Tamotsu
Sato Noboru
Shibayama Yasuhiro
Uchiyama Nobuhito
Furukawa Electric Co. Ltd. (the)
Kamiya Tamotsu
Ridout & Maybee Llp
Sato Noboru
Shibayama Yasuhiro
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