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Quartz optical fiber and preparation method and device thereof

A technology of silica optical fiber and optical fiber preform, which is applied in the field of silica optical fiber, can solve the problems of optical fiber mechanical strength reduction, transmission influence, and optical transmission impact, and achieve the effects of reducing microcracks, increasing tensile strength, and prolonging mechanical life

Active Publication Date: 2021-08-27
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, before the organic coating is applied, microcracks are inevitably generated on the surface of the optical fiber during the drawing process, and these microcracks will reduce the tensile strength of the optical fiber; and during use, these microcracks will continue to expand , so that the mechanical strength of the fiber gradually decreases
At the same time, after microcracks appear in the optical fiber, breakpoints are usually formed inside the optical fiber. Although it does not appear to be broken on the surface, it actually affects the transmission of light. When the light encounters a breakpoint, it will reflect and affect the transmission.

Method used

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  • Quartz optical fiber and preparation method and device thereof
  • Quartz optical fiber and preparation method and device thereof
  • Quartz optical fiber and preparation method and device thereof

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preparation example Construction

[0038] A method for preparing a silica optical fiber proposed in an embodiment of the present invention specifically includes the following steps:

[0039] Step 1, before the temperature of the drawn silica bare optical fiber drops to its glass transition temperature, coat the glass-ceramic liquid on the surface of the bare silica optical fiber to form a glass-ceramic coating, wherein the expansion coefficient of the glass-ceramic is less than 5×10 -7 / °C, preferably the expansion coefficient of the glass-ceramics is 5×10 -9 ~5×10 -7 / °C, the melting temperature is 1200°C-1400°C; the core layer and the skin layer of the bare silica optical fiber are both made of quartz glass.

[0040] The preparation steps of the glass-ceramic liquid specifically include: heating the raw material of the glass-ceramic glass until melting, and clarifying to obtain the glass-ceramic liquid, and keeping the glass-ceramic liquid at a temperature of 1200°C to 1450°C.

[0041] The step of coating ...

Embodiment 1

[0087] (1) Weigh Li 2 O powder 329g, Al 2 o 3 Powder 216g, SiO 2 Powder 127.6g, TiO 2 Powder 20.6g, Sb 2 o 3 Powder 2.5g, ZnO powder 1.5g; Mix the weighed powder and stir evenly, then divide the powder into 6 parts, each 116g;

[0088] (2) Preheat a 500mL corundum crucible in a muffle furnace at 800°C for 2 hours, and then heat it to 1200°C. At this time, add 1 part of the powder obtained in step (1), heat it up to 1430°C in 15 minutes, keep it for 20 minutes, and then Add the second part and keep it warm for 20 minutes, and then add to the sixth part in turn; after the powder is completely melted, clarify it at 1520°C for 2 hours; preheat the platinum-coated cup to 1430°C and keep it warm. Introduce into the platinum coating cup at high temperature;

[0089] (3) Introduce the drawn high-temperature bare optical fiber from the top of the optical fiber preform melting and drawing mechanism, and adjust the axis position of the high-temperature bare optical fiber coming ou...

Embodiment 2

[0093] (1) Weigh Li 2 O powder 312g, Al 2 o 3 Powder 218g, SiO 2 Powder 130g, TiO 2 Powder 27g, Sb 2 o 3 Powder 2g, ZnO powder 3g. Mix the weighed powder and stir evenly, then divide the powder into 6 parts, each 115.3g;

[0094] (2) Preheat a 500mL corundum crucible in a muffle furnace at 800°C for 2 hours, and then heat it to 1200°C. At this time, add 1 part of the powder obtained in step (1), heat it up to 1400°C in 15 minutes, keep it for 20 minutes, and then Add the second part and keep it warm for 20 minutes, and then add to the sixth part in turn; after the powder is completely melted, clarify it at 1550°C for 2 hours; preheat the platinum crucible to 1430°C and keep it warm, and put the glass The liquid is introduced into the platinum coating cup at high temperature;

[0095] (3) Drawing is carried out by the same process as in Example 1. When the temperature of the drawn high-temperature silica bare optical fiber drops to 1650° C., pass the high-temperature si...

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Abstract

The invention relates to a quartz optical fiber and a preparation method and device thereof, and the preparation method comprises the steps: coating the surface of the quartz bare optical fiber with glass-ceramic liquid before the temperature of drawn quartz bare optical fiber is reduced to the glass-transition temperature of the quartz bare optical fiber, so as to form a glass-ceramic coating layer; and after cooling, coating the surface of the glass ceramic coating with an organic coating to form an organic coating layer, so as to obtain the quartz optical fiber, wherein the expansion coefficient of the glass ceramic is smaller than 5*10<-7> / DEG C, and the melting temperature is 1200-1400 DEG C, and the core layer and the sheath layer of the quartz bare optical fiber are made of quartz glass materials. According to the invention, the glass-ceramic coating layer with low expansion coefficient is formed on the surface of the quartz bare optical fiber by adopting a high-temperature online coating method, so that the tensile strength of the quartz optical fiber is improved.

Description

technical field [0001] The invention relates to the technical field of silica optical fiber, in particular to a silica optical fiber and a preparation method and device thereof. Background technique [0002] The optical fiber is composed of a bare optical fiber and a resin layer wrapped on the outside of the bare optical fiber. At this time, the tensile force of the optical fiber can only withstand a force of 5-6kg. When the external force exceeds this range, the optical fiber will break. [0003] The tensile strength of optical fiber is an important performance parameter of optical fiber transmission. If the optical fiber is broken, the signal will not be transmitted directly. Therefore, it is an important link to increase the tensile strength of optical fiber and thus improve the reliability of optical fiber use. [0004] Coating a dense coating on the surface of the optical fiber can seal the optical fiber from external erosion, resulting in high fatigue resistance parame...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C25/54C03C25/42C03C25/285C03C10/12
CPCC03C25/54C03C25/42C03C25/285C03C10/0027
Inventor 杨亮亮贾金升张卓王晓章曹珊珊孙勇张洋赵冉孔壮那天一王一苇
Owner CHINA BUILDING MATERIALS ACAD
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