Apparatus for vitrifying soot preform for optical fiber

Details Apparatus for vitrifying soot preform for optical fiber Apparatus for vitrifying soot preform for optical fiber

C - Chemistry, Metallurgy

03

B

C03B 37/012 (2006.01) C03B 37/014 (2006.01)

Patent

CA 2125320

ABSTRACT OF THE DISCLOSURE An apparatus for vitrifying a soot preform from which an optical fiber is produced by drawing, is composed of a main vacuum chamber 20 in which a muffle tube 70 for vitrifying the soot preform PF is located, and an auxiliary vacuum chamber 30 mounted on the main vacuum chamber 20 and communicated therewith through a passage, and a gate valve 60 for opening and closing the passage. The muffle tube 70 has a inner surface covered with silicon carbide layer 70a.

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