Grilled lamp, sedimentation device and method for improving density of loosened body of optical fiber precast rod

Abstract

The invention discloses a grilled lamp, a sedimentation device and a method for improving density of a loosened body of an optical fiber precast rod. The sedimentation device comprises the grilled lamp and two sedimentation blowing lamps, wherein the two sedimentation blowing lamps are positioned in the same vertical plane; the second sedimentation blowing lamp is positioned above the first sedimentation blowing lamp; the grilled lamp is not positioned in the vertical plane and arranged on the inclined upper part of the second sedimentation blowing lamp along a rotation direction of the loosened body of the optical fiber precast rod. When the grilled lamp and the two sedimentation blowing lamps meet the condition that (c-b) is more than or equal to 0 and less than or equal to (b-a), a, b and c are the heights of a sedimentation point of the first sedimentation blowing lamp, a sedimentation point of the second sedimentation blowing lamp having a distance away from the bottom end of the loosened body of the optical fiber precast rod. The invention also discloses the method for improving the density of the loosened body of the optical fiber precast rod by using the sedimentation device, the grilled lamp used in the sedimentation device and the method for improving the density of the loosened body of the optical fiber precast rod by using the grilled lamp.

Description

technical field [0001] The present invention relates to the field of optical fiber preform manufacturing, in particular to a baking lamp for increasing the density of an optical fiber preform loose body, a method for increasing the density of an optical fiber preform loose body by using the oven lamp, and a method for increasing the density of an optical fiber preform loose body. A deposition device and a method for increasing the density of an optical fiber preform loose body of the deposition device. Background technique [0002] The VAD process deposits the fiber preform fiber preform loose body, the fiber preform loose body grows along the axial direction, and during the growth process, the surface temperature of the upper loose body gradually decreases. Due to the low temperature and low density of soot, a soft layer with a low density of 5-30mm is deposited on the surface of the final loose body. Due to the low density of the surface layer, a larger density gradient i...

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Problems solved by technology

[0004] In order to solve the problem that the density of the soot body of the surface optical fiber preform is small, the present invention provides a baking lamp for increasing the density of the soot body of the optical fiber preform, and a method for increasing the density of the soot body of the optical fiber prefa A deposition device for a preformed rod loose body, and a method for increasing the density of an optical fiber preformed rod loose body in the deposition device

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