Method for reducing optical fiber loss

A technology of optical fiber loss and bare optical fiber, which is applied in the field of optical fiber manufacturing and can solve problems such as inability to effectively reduce optical fiber loss

Active Publication Date: 2015-04-08
NANJING WASIN FUJIKURA OPTICAL COMM LTD
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the wire drawing process, after nearly 10 years of research and development, the low water peak optical fiber has basically been qualitative. Reducing the loss of optical fiber is the direction that many optical fiber manufacturers are working on. The existing literatu

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for reducing optical fiber loss

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] combine figure 1 A method of manufacturing the low-loss optical fiber of the present invention will be described.

[0016] After the preform is drawn, the bare optical fiber is obtained, and passes through the cooling system from top to bottom at a speed of 1500m / min, and then coated to obtain the optical fiber. The cooling system includes four cooling cylinders with a length of 1200mm and the connectors between the cooling cylinders. The cooling cylinder is equipped with a first pipeline for transporting helium and optical fiber movement. The inner diameter of the first pipeline is 10mm, and the flow rate of helium is 4-5L / min, the intake air temperature is 20±3℃. Cooling water is passed between the cooling cylinder and the first pipeline, the flow rate of the chiller is 8L / min, and the temperature of the cooling water is 17°C. Cooling water and helium flow from bottom to top. Under normal circumstances, each cooling cylinder is equipped with two third pipelines th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention aims to provide a method for reducing optical fiber loss, and relates to the optical fiber manufacturing field. The method for reducing the optical fiber loss comprises the step of cooling a naked optical fiber obtained after preformed bar drawing by adopting a cooling system, wherein the cooling system comprises a plurality of cooling cylinders, each cooling cylinder is internally provided with a first pipeline for conveying cooling gas and for the optical fiber to move, cooling water is introduced between the cooling cylinders and the first pipelines, each cooling cylinder is internally provided with a second pipeline in interference fit with the first pipeline, and the inner diameters of the plurality of the second pipelines separated from top to bottom are increased gradually. The method for reducing the optical fiber loss is simple, ingenious, and low in cost, and can significantly reduce the optical fiber loss.

Description

technical field [0001] The invention relates to the field of optical fiber manufacturing, in particular to a method for reducing optical fiber loss. Background technique [0002] The loss of optical fiber is the main performance of optical fiber transmission. The loss is large and the transmission distance is short. Therefore, in order to reduce the use of relay stations, the loss of optical fiber must be reduced. The loss of optical fiber is divided into intrinsic loss and manufacturing loss. [0003] Intrinsic loss refers to a kind of loss inherent in the fiber material, which is unavoidable, and it determines the loss limit of Rayleigh scattering of the fiber. Optical fiber manufacturing loss is generated during the process of manufacturing optical fiber, mainly caused by the absorption of impure components in the optical fiber (impurity absorption) and the structural defects of the optical fiber. The major impact of impurity absorption is the loss of light caused by var...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C03B37/025
CPCY02P40/57
Inventor 王小泉杨飏姚晗武强郭洪光周利佳
Owner NANJING WASIN FUJIKURA OPTICAL COMM LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap