Vapor axial deposition apparatus and vapor axial deposition method

A vapor-phase axial deposition, vertical axis technology, used in glass deposition furnaces, glass manufacturing equipment, glass production, etc., can solve the problem of difficulty in maintaining focus, not fully considering the overall temperature distribution of soot preforms, and reducing the quality of soot preforms. question
CN1951848AInactive Publication Date: 2007-04-25SAMSUNG ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SAMSUNG ELECTRONICS CO LTD
Publication Date
2007-04-25
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

Disclosed is a vapor axial deposition apparatus. The vapor axial deposition apparatus includes a first torch, a second torch, a temperature measuring unit and a controller unit. The first torch deposits soot on a distal end of a soot preform aligned with a vertical axis to thereby grow a core. The second torch deposits soot on an outer circumferential surface of the core to thereby grow a clad. The temperature measuring unit detects the temperature distribution of an end portion of the soot preform along the vertical axis. The controller unit determines first and second relative maximum temperatures T 1 and T 3, and relative minimum temperature T 2 between T 1 and T 3 in the detected temperature distribution, and controls T 1 to be within a predetermined range and the greater one of the difference (T 1 -T 2 ) and (T 3 -T 2 ) to not exceed a predetermined temperature.
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Description

technical field

[0001] The present invention relates to an apparatus and method for manufacturing an optical fiber preform, and more particularly, to a vapor axial deposition (VAD) apparatus and a vapor axial deposition method. Background technique

[0002] The vapor-phase axial deposition method is a method of depositing soot on a starting rod made of glass material by using first and second torches to grow into a core and cladding in the longitudinal direction, thereby obtaining soot The preform method. Subsequently, the soot preform is subjected to a sintering process and the like to obtain an optical fiber preform.

[0003] U.S. Patent No. 6,834,516 entitled "Manufacture of Optical Fiber Preform Using Improved VAD" and granted to Donald P. A vapor-phase axial deposition method for obtaining a soot preform with a uniform composition, in which an optical pyrometer is arranged together with a core torch.

[0004] However, such a vapor phase axial deposition method has th...

Claims

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