Deposition reaction device for manufacturing low-loss optical fiber preform rod and pressure adjusting method

A technology of optical fiber preform and deposition reaction, which is applied in glass manufacturing equipment, manufacturing tools, etc., can solve the problems such as adverse effects of light attenuation characteristics, and achieve the effects of less metal impurity content, uniform deposition, and low impurity absorption loss

Inactive Publication Date: 2016-07-20
TENGCANG FENGHUO PHOTOELECTRIC MATERIAL TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the purified air contains trace amounts of metal impurities
The metal impurities in the air are mixed into the optical fiber preform, which has a bad influence on the optical attenuation characteristics

Method used

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  • Deposition reaction device for manufacturing low-loss optical fiber preform rod and pressure adjusting method

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Embodiment Construction

[0021] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] see figure 1 As shown, the embodiment of the present invention provides a deposition reaction device for preparing a low-loss optical fiber preform, the device includes a reaction vessel 1 with an open top, and the device also includes a pressure gauge 5, a controller 8, and the pressure gauge 5 and the reaction vessel 1. The containers 1 are connected, and a high-purity inert gas with a purity higher than 99% circulates inside the reaction container 1; a first torch 3 for preparing a cladding layer and a second torch 4 for preparing a core layer are arranged on one side of the reaction container 1, The second blowtorch 4 is positioned between the plane where the first blowtorch 3 and the bottom of the reaction vessel 1 are located; the bottom of the reaction vessel 1 is connected with a piping 7, and the piping 7 communicates with the i...

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Abstract

The invention discloses a deposition reaction device for manufacturing a low-loss optical fiber preform rod and a pressure adjusting method, and relates to the technical field of manufacturing of optical fiber preform rods. The device comprises a pressure gauge, a controller and a reaction vessel with an open top, wherein the pressure gauge and the reaction vessel are connected, and high-purity inert gas with purity higher than 99 percent circulates in the reaction vessel; a first blast burner for making a cladding layer and a second blast burner for making a core layer are arranged on one side of the reaction vessel, and the second blast burner is located between the first blast burner and a plane of the bottom of the reaction vessel; the bottom of the reaction vessel is connected with a matching pipe, the matching pipe is communicated with the inside of the reaction vessel, a flow adjuster is arranged on the matching pipe and the flow adjuster is connected with the pressure gauge through the controller. According to the deposition reaction device for manufacturing the low-loss optical fiber preform rod and the pressure adjusting method, metal impurities can be effectively prevented from entering glass micro-particle sedimentary bodies, the content of metal impurities in the manufactured optical fiber preform rod is low and the impurity absorption loss is smaller.

Description

technical field [0001] The invention relates to the technical field of manufacturing optical fiber preforms, in particular to a deposition reaction device and a pressure regulating method for preparing low-loss optical fiber preforms. Background technique [0002] One of the main steps of the VAD (Vapor-phase Axial Deposition, Vapor-Phase Axial Deposition) method of the optical fiber preform manufacturing method is to generate glass particles by a blowtorch, and form a deposit of glass particles in a reaction vessel. In the existing deposition reaction device, a number of air holes are opened on the side wall of the reaction vessel, and after the air is purified by a HEPA filter, the air is then supplied into the reaction vessel. However, purified air contains trace amounts of metal impurities. The metal impurities in the air are mixed into the optical fiber preform, which has a bad influence on the optical attenuation characteristics. Contents of the invention [0003] ...

Claims

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Application Information

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IPC IPC(8): C03B37/014
CPCC03B37/01406
Inventor 横田和宏李亚明徐辉桥
Owner TENGCANG FENGHUO PHOTOELECTRIC MATERIAL TECH CO LTD
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