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Method for producing and processing preform, preform and optical fiber

A technology for prefabricated parts and optical fibers, applied in the field of optical fibers, can solve problems such as cost increase, and achieve the effects of good processing reliability, cost reduction, and processing reliability improvement.

Active Publication Date: 2012-01-18
西里特克光纤公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] It is therefore to be noted that silica particles with selective properties are applied to avoid the described problems, but this again leads to an increase in cost

Method used

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  • Method for producing and processing preform, preform and optical fiber
  • Method for producing and processing preform, preform and optical fiber
  • Method for producing and processing preform, preform and optical fiber

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Embodiment Construction

[0055] Figure 1a shows the SiO 2 Manufactured thin-walled quartz tube 11 having a main axis x, an inner space 110 and a conical closure 111 at its lower end. The diameter d10 of the wall of the quartz tube 11 is very small compared to the diameter of the quartz tube 11 so that a relatively larger part of the preform will comprise high quality silica particles.

[0056] Fig. 1b shows the quartz tube 11 of Fig. 1a, wherein the inner space 110 is completely filled with silica particles 5 to obtain a raw primary preform 1p'. As shown in Figure 1b, the filling process was not accompanied by the heating process.

[0057] Fig. 1c shows the raw primary preform 1p' of Fig. 1b being closed by means of an abutment 3. The abutment 3 comprises a first channel 31 and a second channel 32 . A first channel 31 designed to optionally receive a primary preform 1p', 1p or a glass blank is closed by a cover 4. The second channel 32 is connected to a vacuum pump 22 which evacuates the quartz tu...

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Abstract

The method for producing and processing a preform (1p, 1s) comprises a preliminary process phase, in which silica grain (5a; 5b) is supplied into the interior space (110) of a silica tube (11) having an open upper end and a closed lower end (111), in order to obtain an unprocessed preform (1p, 1s ), and comprises a final process phase, in which the interior space (110) of the silica tube (11) is closed, a condition of reduced pressure is generated, the unprocessed preform (1p, 1s ) is heated with a final process temperature in order to fuse the silica tube (11) and the silica grain (5b). According to the invention the silica grain (5a; 5b) entering the interior space (110) is thermally treated during the preliminary process phase with an intermediate process temperature that lies under the melting point of the silica grain.

Description

technical field [0001] The present invention relates to methods for producing and processing primary, secondary or higher-grade preforms, as well as to such preforms and optical fibers drawn from said preforms. Background technique [0002] The manufacture of optical fibers such as those currently used in ultra-high-speed data communication networks is carried out in [1] Mool C. Gupta, Handbook of PHOTONICS, CRC Press, 1997 Boca Ration, Chapter 10.7, pp. 445-449 describe. The main process steps of optical fiber manufacturing are: making a preform, drawing an optical fiber from the preform, and coating the optical fiber with a material that protects the optical fiber from handling and environmental influences. [0003] In the drawing process, the preforms are fed from above into the drawing section of the furnace, while being drawn from the bottom using tractors. The fiber was then wound onto a drum while the tensile strength was monitored. The temperature during drawing i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/012C03B37/027
CPCC03B2205/07C03B2205/74C03B2203/42C03B37/01297C03B37/0122C03B37/027C03B2205/08C03B37/02781
Inventor F.桑多茨C.佩德里多P.里鲍克斯P.哈梅尔
Owner 西里特克光纤公司
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