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Method for evaluating optical fibers during manufacturing thereof

A technology of optical fiber and fiber, applied in the field of optical fiber, to achieve the effect of reducing process waste

Active Publication Date: 2013-05-22
PRYSMIAN SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The applicant has solved the problem of devising an optical fiber evaluation method which is not, or at least less affected by, the problems of the known fiber screening methods described above, as long as fiber tensile strength is taken into account

Method used

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  • Method for evaluating optical fibers during manufacturing thereof
  • Method for evaluating optical fibers during manufacturing thereof
  • Method for evaluating optical fibers during manufacturing thereof

Examples

Experimental program
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Embodiment Construction

[0054] Referring to the accompanying drawings, in figure 1 An apparatus generally indicated at 100 for drawing an optical fiber is schematically shown in . Apparatus 100 is typically inserted in a fiber drawing tower (not shown).

[0055] A glass preform 101 is drawn into a furnace (oven) 102 to obtain optical glass fibers 103 . Fibers 103 are pulled down by pulling device 150 . The diameter of the fiber 103 is measured by a first diameter measuring device 140 . In case of deviation from the target value (eg 125 μm), the first diameter measuring device 140 is adapted to send a signal to the traction device 150 which will change its rotational speed appropriately.

[0056] The fibers 103 are cooled to a temperature typically below 50°C as they pass through the cooling tube 112, and the fibers 103 then pass through a first coating device 121 adapted to apply the The first coat of paint is applied to the fibers 103.

[0057] Then, the fiber 103 passes through a curing device...

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PUM

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Abstract

A method of evaluation of an optical fiber (103) during manufacturing thereof, said method comprising: - subjecting (410) a predetermined initial length of the optical fiber to a predetermined first tensile stress while the optical fiber is being drawn from a fiber preform (101); - detecting (415) a number of fiber breakages occurring in said initial length of optical fiber; - if the detected number of fiber breakages exceeds a predetermined first threshold, stopping the fiber drawing process (430); - otherwise removing the first tensile stress from the optical fiber and continuing the drawing process until completion (420,425).

Description

technical field [0001] The present invention relates generally to optical fibers and to their manufacture. In particular, the present invention relates to a method for the evaluation of optical fibers during their production, especially during drawing of the fibers from a preform. Background technique [0002] Optical fibers, especially those intended for telecommunication applications, need to have good optical properties. These properties include, for example, low attenuation and low pulse spread. [0003] Another important property that an optical fiber should have is a sufficiently high tensile strength. Tensile strength is a mechanical property that an optical fiber needs to possess, at least to a given extent, in order to ensure that damage and breakage of the optical fiber does not occur during installation of the optical fiber. [0004] In order to protect the optical fiber surface from mechanical and chemical damage, the optical fiber is usually coated by applyin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08G01M11/08
CPCG01N33/386G01M11/088G01N3/08G01N2203/0278G01N2203/028
Inventor N·斯卡富罗M·维托洛G·特斯塔A·马佐提P·鲁索
Owner PRYSMIAN SPA