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High-precision heating furnace for mid-infrared optical fiber drawing tower

A fiber drawing tower, high-precision technology, applied in the field of infrared optical fiber preform heating furnace design, can solve the problems of unable to pull out optical fiber, large floating range of wire diameter, breakage, etc., to prevent external oxygen and air pollution, avoid analysis crystal, thick effect

Active Publication Date: 2019-01-11
西安思翰光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many ways to design the heating furnace. However, there is a large amount of crystallization in the drawn infrared optical fiber, which leads to a large fluctuation range of the wire diameter, breakage during the drawing process, and even the fiber cannot be pulled out.

Method used

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  • High-precision heating furnace for mid-infrared optical fiber drawing tower
  • High-precision heating furnace for mid-infrared optical fiber drawing tower
  • High-precision heating furnace for mid-infrared optical fiber drawing tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Embodiment 1 "|" shaped preform heating furnace

[0072] The whole furnace body is 50cm high and 140mm wide. It is divided into upper, middle and lower parts. The upper part is mainly the inlet device and the upper flange fixing device, the middle part is the heating part of the furnace body, and the lower part is the gas outlet device. Furnace heating part: The diameter of the heating part of the entire heating furnace is 132mm, and the height is 100-150mm. It adopts the 309 type special heating steel material in the shape of "┃┃". The size of the special heating steel material is 45-65mm in height and 8- 12mm; the size of the resistor is Φ8 (mm), and the inner diameter of the outer ceramic tube is Φ12; the quartz tube is flame-polished, the diameter is 26-38mm, the thickness of the quartz tube is 2-6mm, and the length is 45cm. The back of the special heating steel is filled with glass fiber and cotton, evenly and symmetrically filled around the quartz tube. Air inlet...

Embodiment 2

[0081] Example 2 Shaped Preform High Precision Furnace

[0082] The whole furnace body is 50cm high and 140mm wide. It is divided into upper, middle and lower parts. The upper part is mainly the inlet device and the upper flange fixing device, the middle part is the heating part of the furnace body, and the lower part is the gas outlet device. Furnace heating part: The diameter of the heating part of the entire heating furnace is 132mm, and the height is 150mm. Shaped 600 model special heating steel material, The long side is 60-80mm, the two short sides are 45-55mm, and the thickness is 8-12mm; the size of the resistance wire is Φ2-6(mm), and the inner diameter of the outer ceramic tube is Φ8; the quartz tube is flame polished, and the diameter is 26-38mm, quartz tube thickness 2-6mm, length 45cm. The back of the special heating steel is filled with glass fiber and cotton, evenly and symmetrically filled around the quartz tube.

[0083] Air inlet: Φ0.5-4 sealing ring a...

Embodiment 3

[0092] Example 3 "]" shaped preform high-precision heating furnace

[0093] The whole furnace body is 50cm high and 140mm wide. It is divided into upper, middle and lower parts. The upper part is mainly the inlet device and the upper flange fixing device, the middle part is the heating part of the furnace body, and the lower part is the gas outlet device. Furnace heating part: The diameter of the heating part of the heating furnace is 132mm, and the height is 150mm. It adopts the 630 type special heating steel material in the shape of "][", the long side of "][" is 60-80mm, the width is 20-35mm, and the thickness It is 4-8mm; the size of the resistance wire is Φ4-8 (mm), and the inner diameter of the outer ceramic tube is Φ12; the quartz tube is flame-polished, the diameter is 26-38mm, the thickness of the quartz tube is 2-6mm, and the length is 45cm. The back of the special heating steel is filled with glass fiber and cotton, evenly and symmetrically filled around the quartz ...

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Abstract

The present invention discloses a high-precision heating furnace for a mid-infrared optical fiber drawing tower. The heating furnace comprises a furnace body, an air inlet device at the top of the furnace body, a quartz tube arranged between the furnace body and a compound heating module arranged in the middle portion of an outer wall of the quartz tube; an upper flange is arranged in the top of the furnace body, the air inlet device is mounted on the upper flange, an upper seal is mounted at the top end of the air inlet device, and a lower flange us arranged in the bottom of the furnace body; and an upper circular hole is formed at the center of the upper flange, a lower circular hole is formed at the center of the lower flange, an upper circular ring-shaped groove is formed at the edge of the upper circular hole, a lower circular ring-shaped groove is formed at the edge of the lower circular hole, the top of the quartz tube is connected to the upper circular ring-shaped groove, the bottom of the quartz tube is connected to the lower circular ring-shaped groove, the quartz tube communicates with the air intake device, and the quartz tube is filled with inert gas. The high-precision heating furnace disclosed by the present invention can be used for manufacturing optical fibers such as infrared chalcogenide and tellurate glass without crystallization, wherein the wire diameter of the optical fibers is stably controlled within an error range of + / -0.5 micron.

Description

Technical field: [0001] The invention relates to a high-precision heating furnace for a mid-infrared optical fiber drawing tower in the optical fiber manufacturing process, and is especially suitable for making infrared optical fibers (chalcogenide, Design method of preform heating furnace for tellurite glass and other optical fibers). Background technique: [0002] The low-loss silica fiber technology born in the 1970s and the invention of the ultra-low-loss anhydrous silica fiber developed later led human society into the era of optical communication. The glorious history of silica fiber continued until 2005. It has experienced the development of solid-core single-mode / multi-mode fiber, photonic crystal fiber, large-mode field fiber, and Bragg fiber. It seems to have reached the end of its history. From the point of view of materials science, we will find that silica fiber is just silicate glass (SiO 2 It is a high-level form of expression of the main component), and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B37/029
Inventor 林傲祥
Owner 西安思翰光电科技有限公司
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