A control method and equipment for off-rod vapor deposition

Abstract

The present application relates to a control method and equipment for vapor phase deposition outside a rod, and relates to the technical field of optical fiber preform rod manufacturing. This control method first determines the opening values ​​of multiple exhaust valves before the deposition starts, and forms a theoretical adjustment curve of the opening value of multiple exhaust valves during deposition according to the fitting of the multiple opening values. Monitor the outer diameter of the loose body during the process. If the outer diameter of the loose body is monitored to increase the preset thickness, the corresponding segment of the theoretical adjustment curve will be moved downward along the ordinate direction of the coordinate where it is located. If it is detected that the increased thickness of the outer diameter of the loose body is less than the preset thickness, then keep the shape of the corresponding section of the theoretical adjustment curve unchanged, and finally adjust the opening of each exhaust valve in real time according to the actual shape of the adjustment curve value. The control method provided by the present application solves the problem in the related art that the deposition quality and efficiency of the soot body are difficult to maintain during the deposition process.

Description

technical field [0001] The present application relates to the technical field of optical fiber preform rod manufacturing, in particular to a control method and equipment for vapor phase deposition outside the rod. Background technique [0002] At present, with the rapid development of the optical communication industry and the continuous upgrading of related industries, the quality requirements for optical fiber preforms in the market are becoming more and more stringent. In the field of optical communication manufacturing, the combination of axial vapor deposition VAD (VaporAxial Deposition) is generally used. The "two-step method" synthesis process of external vapor deposition OVD (Outside Vapor Deposition) is used to prepare the optical fiber preform. Among them, the VAD method is used to deposit and prepare the core rod, and the OVD method is used to deposit the outer cladding, and the soot is vitrified. Became an optical fiber preform. Specifically, the OVD method uses...

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Problems solved by technology

[0005] The embodiment of the present application provides a control method and equipment for off-rod vapor deposition to solve the problem in the related art that the deposition quality and efficiency of the soot are difficult to maintain during the deposition process.

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