Method and device for manufacturing an optical preform
A prefabricated, optical fiber technology, used in transportation and packaging, glass manufacturing equipment, manufacturing tools, etc., can solve the problems of geometric cone optical cone development, defects, etc.
Active Publication Date: 2014-07-23
DRAKA COMTEQ BV
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Problems solved by technology
[0008] The disadvantage of the above technique is that due to the reciprocating movement of the energy source, defects can appear near the turning point in the layer deposited inside the glass substrate tube
[0017] The optimization of the geometric taper in the methods disclosed in the prior art for the preparation of preforms leads to the development of the optical taper and vice versa
Method used
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Embodiment
[0061] The figures show a gas supply system 4 according to the invention comprising a primary gas flow 6 mainly comprising SiCl and a secondary gas flow 5 4 / O 2 , and the second gas stream 5 includes, for example, GeCl 4 The germanium-containing compound, while the second gas stream 5 generally includes a carrier gas such as oxygen, in which dopants are present. For example, in the main gas flow 6 there is a typical dopant, such as a dopant that increases and / or decreases the refractive index, such as GeCl 4 and C 2 f 6 . The incoming second gas flow 5 is subdivided into four sub-flows 9 , 10 , 11 , 12 by means of a first distribution unit 7 . There are controllable valves 1 and vents 2 on the airflow path of each sub-flow 9-12, the maximum flow rate value of sub-flow 9 is 1 (arbitrary unit), the maximum flow rate value of sub-flow 10 is 2 (arbitrary unit), sub-flow The maximum flow rate value for gas stream 11 is 4 (arbitrary units) and the maximum flow rate value for ...
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The present invention relates to a method of preparing a preform for an optical fiber by an internal vapor deposition process, the method comprising the steps of: i) providing a hollow glass substrate tube; ii) providing a hollow glass substrate tube containing doped A glass-forming gas of a dopant, wherein the supply gas stream comprises a main gas stream mainly comprising a glass-forming gas and one or more second gas streams comprising mainly a dopant gas stream iii) creating conditions inside the hollow glass substrate tube under which deposition of the glass layer takes place inside the hollow glass substrate tube; and possibly iv) shrinking the obtained substrate tube to form a solid preform, wherein, The second air flow includes an inflow air flow and an outflow air flow, and wherein the second air flow is subdivided into N parallel sub-flows, and these sub-flows are supplied into the hollow glass substrate tube together with the main air flow, where N≥2.
Description
technical field [0001] The present invention relates to a method for preparing preforms for optical fibers by an in-house vapor deposition process, the method comprising the following steps: [0002] i) providing a hollow glass substrate tube; [0003] ii) supplying a glass-forming gas containing a dopant to the interior of the hollow glass substrate tube, wherein the supply gas flow comprises a primary gas flow comprising primarily a glass-forming gas and one or more secondary gas flows, the primary gas flow comprising primarily a glass-forming gas, and the The one or more second gas streams mainly include dopants; [0004] iii) creating conditions inside the hollow glass substrate tube under which deposition of the glass layer occurs inside the hollow glass substrate tube; and possibly [0005] iv) Subjecting the obtained substrate tube to a collapsing treatment to form a solid preform. The invention also relates to a device for supplying a gas inside a hollow glass subst...
Claims
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IPC IPC(8): C03B37/018
CPCC23C16/045C23C16/45561C03B37/01823Y10T137/87265C03B37/01807C03B37/0183C23C16/401
Inventor 伊格尔·米里切维奇马托伊斯雅各布斯尼古拉斯·范斯特伦约翰尼斯安东·哈特苏克罗兰·霍伊费尔曼
Owner DRAKA COMTEQ BV