Device for improving stability of optical fiber preform prepared by VAD

A technology of optical fiber preform and stability, which is applied in the field of optical communication, can solve problems such as unstable deposition of VAD process equipment and unstable core layer diameter, and achieve the effects of reducing attenuation, improving stability, and improving product quality

Pending Publication Date: 2021-10-08
武汉智纤科技有限公司
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  • Abstract
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Problems solved by technology

[0007] In view of the above problems, the purpose of the present invention is to provide a device for improving the stability of optical fiber preforms prepared by VAD, aiming at solving technical problems such as unstable deposition of existing VAD process equipment, unstable core diameter, etc.

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  • Device for improving stability of optical fiber preform prepared by VAD

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Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0018] In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.

[0019] figure 1 The structure of the device for improving the stability of the optical fiber preform prepared by VAD provided by the embodiment of the present invention is shown, and only the parts related to the embodiment of the present invention are shown for convenience of description.

[0020] Such as figure 1 As shown, the device for improving the stability of optical fiber preform prepared by VAD provided in this embodiment includes a deposition chamber 3, and t...

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Abstract

The invention is applicable to the technical field of optical communication, and provides a device for improving the stability of an optical fiber preform prepared by VAD. The device comprises a deposition cavity, a core lamp and a wrapping lamp, wherein one end of the deposition cavity is an air inlet cover, the other end of the deposition cavity is an exhaust cover, a guide rod and the top of an upper cylinder are sealed through a sealing assembly, the upper cylinder is further provided with an air supplementing opening, a plurality of layers of filters are arranged at an air inlet of the air inlet cover from top to bottom, and a communicated pressure stabilizing cavity is formed in a port of the exhaust cover. According to the invention, airflow in each area in the deposition cavity is controlled, the stability of the deposition process is improved, dust is discharged in time, secondary deposition of dust is avoided, the uniformity of the diameter of the core rod is improved, attenuation is reduced, and the product quality is improved.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and in particular relates to a device for improving the stability of an optical fiber preform prepared by VAD. Background technique [0002] Conventional preparation methods for optical fiber preform core rods include modified chemical vapor deposition (MCVD), plasma chemical vapor deposition (PCVD), vapor axial deposition (VAD), and external vapor deposition (OVD). Among them, the VAD process is favored by manufacturers because of its following advantages: 1. Fully synthetic process; 2. High-efficiency manufacturing of large preforms; 3. Mandrels prepared from low-purity raw materials with low cost; 4. Deposition in a closed environment. [0003] The VAD process is carried out in the deposition chamber, and the process is as follows: the rotating feed fixture drives the lead rod and the target rod to rotate, and the core lamp and the bag lamp spray out SiCl 4 、GeCl 4 、H 2 and 0 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/014
CPCC03B37/0142
Inventor 张亮沈文义张文俊甘发勇
Owner 武汉智纤科技有限公司
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