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Method for producing fibre-optical precast stick

An optical fiber preform, preform technology, applied in glass manufacturing equipment, optics, light guide, etc., to achieve the effect of significant economic benefits

Inactive Publication Date: 2004-02-04
JIANGSU FASTEN PHOTONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The above two methods have their own characteristics, but the combination of the two methods requires the cooperation of technological conditions, and no mature and available literature reports have been seen so far.

Method used

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  • Method for producing fibre-optical precast stick
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  • Method for producing fibre-optical precast stick

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Embodiment Construction

[0024] First. As shown in Figure 1, when using the MCVD method, at first a high-purity quartz glass tube 2 is clamped on the chucks 3 on both sides of the MCVD lathe and rotated, with a hydrogen-oxygen torch 1 as a heat source, along the The quartz tubes move in parallel for heating. A series of gas-phase chemical mixtures (SiCl4, GeCl4, POCl3, etc.) are driven by the carrier oxygen through the bubbler system (Bubbler), and the flow is controlled by a precise mass flow controller, and some other reaction gases (He, C12 and O2, etc.), a chemical reaction occurs at a temperature of about 1400-1800 °C in the hydrogen-oxygen flame, and extremely fine particles are deposited inside the quartz tube. As each layer is deposited, the flame fuses the glass particles just deposited downstream into a thin layer of glass. In this way, it is deposited layer by layer, the cladding layer is deposited first, and then the core layer is deposited. When the deposition is finished, use a high te...

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Abstract

A process for preparing the prefabricated optical fibre rod includes such steps as internal vapor-phase depositing in pure quartz tube to form wrapper layer and core layer, fusing at 2100-2300 deg.C and solidifying to obtain solid core rod, polishing its surface by high-temp hydrogen-oxygen flame at 2000-2100 deg.C, external vapor-phase depositing to wrap quartz material on core rod, and slow high-temp heating to obtain large transparent prefabricated rod used to prepare single-mode optical fibres. Its advantages are high quality and low cost.

Description

1. Technical field [0001] The present invention relates to a preparation method for optical fiber prefabricated rod, that is to use MCVD (Modified Chemical Vapor Deposition) improved chemical vapor deposition method and OVD (Outside Vapor Deposition) external vapor deposition method to make single-mode optical fiber prefabrication Great way. 2. Background technology [0002] The optical fiber preform is the base material for producing optical fiber, and the optical parameters and geometric parameters of the optical fiber are closely related to the parameters of the base material. At present, the more popular method of producing optical fiber preforms is called the two-step method, that is, the core rod of the optical fiber is produced first, and then the cladding is produced outside. [0003] The method of producing mandrel can be divided into internal method and external method according to the characteristics of the process. Internal methods include plasma chemical vapor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/012C03B37/014G02B6/00
CPCC03B37/01807C03B37/01446C03B37/01413C03B37/0148C03B2201/28C03B2201/31
Inventor 查健江梁乐天卞进良孙建军严薇
Owner JIANGSU FASTEN PHOTONICS