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Extrusion device and method for extruding chalcogenide glass optical fiber perform with superposition method

A technology of optical fiber preform and chalcogenide glass, which is applied in glass manufacturing equipment, glass production, manufacturing tools, etc. It can solve the problems of adverse effects on optical fiber quality, uneven structure and composition of preform, and low production efficiency, so as to facilitate performance testing , High production efficiency, ideal interface effect

Active Publication Date: 2013-12-25
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN102531377 introduces a vacuum extruder for preparing chalcogenide glass optical fiber preforms. The extruder extrudes the chalcogenide glass so that the softened glass passes through the mold, and the chalcogenide glass is then annealed. Chalcogenide glass optical fiber preforms can be obtained, but when the extruder extrudes the chalcogenide glass optical fiber preforms, the extruded preforms are greatly affected by gravity, resulting in various defects such as uneven structure and composition of the preforms , the production efficiency is not high, and it will adversely affect the quality of the subsequent drawn optical fiber

Method used

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  • Extrusion device and method for extruding chalcogenide glass optical fiber perform with superposition method

Examples

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Effect test

Embodiment 1

[0034] Example 1: Extrude an optical fiber preform from a chalcogenide glass whose components are sulfide, selenide and antimonide. The crystallization temperature of the glass, Tg is the transition temperature of the chalcogenide glass; the extrusion method includes the following steps: 1) Prepare multiple pieces of chalcogenide glass and polyethersulfone (PES), rinse with alcohol and dry, Put it into a vacuum container; 2) First take out a piece of polyethersulfone, then stack multiple pieces of chalcogenide glass on top of the piece of polyethersulfone, and then put the stacked polyethersulfone and chalcogenide glass together Extrude the cylinder, and place the polymer at the bottom of the extrusion cylinder; 3) Use a vacuum pump to evacuate the vacuum chamber, when the vacuum degree of the vacuum chamber is lower than 10 -2 Pa, add an inert gas to the vacuum chamber, the inert gas can be nitrogen or argon, so that the pressure in the vacuum chamber is the same as the exter...

Embodiment 2

[0035] Example 2: Extrude an optical fiber preform from a chalcogenide glass whose components are sulfide and selenide. Crystallization temperature, Tg is the transition temperature of the chalcogenide glass; the extrusion method includes the following steps: 1) Prepare a number of pieces of chalcogenide glass and polysulfone (PSU), rinse with alcohol, dry, and put them into a vacuum container Middle; 2) Take out a piece of polysulfone first, then stack several sheets of chalcogenide glass on top of the piece of polysulfone, then put the stacked polysulfone and chalcogenide glass into the extrusion cylinder together, and make The high molecular polymer is placed at the bottom of the extrusion cylinder; 3) Use a vacuum pump to evacuate the vacuum chamber, when the vacuum degree of the vacuum chamber is lower than 10 -2 Pa, add an inert gas to the vacuum chamber, the inert gas can be nitrogen or argon, so that the pressure in the vacuum chamber is the same as the external atmosp...

Embodiment 3

[0036] Example 3: Extrude an optical fiber preform from a chalcogenide glass whose components are sulfide, selenide and telluride. The crystallization temperature of the glass, Tg is the transition temperature of the chalcogenide glass; the extrusion method includes the following steps: 1) Prepare multiple pieces of chalcogenide glass and polyimide (PI), rinse with alcohol and dry , and put it into a vacuum container; 2) First take out a piece of polyimide, then stack multiple pieces of chalcogenide glass on top of the piece of polyimide, and then put the stacked polyimide and chalcogenide glass together The glass is put into the extrusion cylinder together, and the polymer is placed at the bottom of the extrusion cylinder; 3) Use a vacuum pump to evacuate the vacuum chamber. When the vacuum degree of the vacuum chamber is lower than 10 -2 Pa, add an inert gas to the vacuum chamber, the inert gas can be nitrogen or argon, so that the pressure in the vacuum chamber is the same ...

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Abstract

The invention discloses an extrusion device and method for extruding a chalcogenide glass optical fiber perform with a superposition method. A pushing mechanism of the extrusion device is arranged above an extrusion container, and an extrusion rod is fixedly connected with the pushing mechanism; a heating furnace set used for heating the extrusion container is arranged outside the extrusion container, and a vacuum chamber is arranged outside the heating furnace set and is connected with a vacuum pump; an extrusion pad is arranged in the extrusion container, and an extrusion outlet is formed in the lower end of the extrusion container; a mould is arranged at the bottom of the extrusion container, and a mould hole of the mould is communicated with the extrusion outlet; a heat reducing furnace used for annealing the extruded optical fiber perform is arranged at the bottom of the extrusion container, and a traction device is arranged at the lower part of the heat reducing furnace. The extrusion device and the method have the characteristics of good controllability and high production efficiency.; the superposition method is adopted to extrude chalcogenide glass, and the obtained optical fiber perform has uniform structural composition, smooth inner and outer surfaces and a perfect interface; a surface layer is provide with a protective layer composed of high-molecular polymers, so that a performance test after drawing optical fibers is facilitated.

Description

technical field [0001] The invention relates to the preparation of a chalcogenide glass optical fiber preform rod, in particular to an extrusion device and method for extruding a chalcogenide glass optical fiber preform rod by a stacking method. Background technique [0002] In the preparation process of communication optical fiber, one of the important contents is the preparation of optical fiber preform. At present, there are four kinds of traditional optical fiber preform preparation technologies, which are external vapor deposition (OVD) and vapor axial deposition. (VAD), modified vapor deposition (MCVD) and plasma chemical vapor deposition (PCVD). In the past two decades, the OVD method has developed from single torch deposition to simultaneous deposition of multiple torches, and the deposition rate has doubled, realizing the simultaneous deposition of multiple rods by one device, and the development of a one-step process from sequentially depositing core cladding to ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/012
CPCC03B37/01274C03B2201/86Y02P40/57
Inventor 王训四朱敏鸣张培全徐会娟姜晨刘永兴戴世勋聂秋华徐铁峰沈祥
Owner NINGBO UNIV
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