Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Rare earth doped optical fiber preformed rod and preparation method thereof

A technology of optical fiber preform and rare earth doping, which is applied in the direction of glass manufacturing equipment, glass fiber products, manufacturing tools, etc., can solve the problems of large differences in optical fiber parameters, and achieve concentricity, reduce wire diameter fluctuations, and easy control Effect

Active Publication Date: 2017-12-22
YANGTZE OPTICAL FIBRE & CABLE CO LTD
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By adding a layer of low-refraction quartz cladding with a circular cross-sectional shape to the irregular quartz cladding, the problem of large differences in fiber parameters caused by non-circular preform wire diameter and tension fluctuations is solved, and the pumping light is reduced. Leakage, extended fiber life

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
  • Rare earth doped optical fiber preformed rod and preparation method thereof
  • Rare earth doped optical fiber preformed rod and preparation method thereof
  • Rare earth doped optical fiber preformed rod and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] The preparation method of the rare earth-doped optical fiber preform provided by the present invention comprises the following steps:

[0040] (1) Wrap the doped core layer with the first quartz cladding material and stretch it until the cross-sectional area ratio matches the cross-sectional area ratio of the second quartz cladding layer, and process its cross section into a predetermined shape to obtain a semi-finished preform;

[0041] (2) Wrap the semi-finished preform obtained in step (1) with a second quartz cladding material, and process its cross section into a circle to obtain the doped optical fiber preform.

[0042] It is preferred to adopt the shrinkage burning method, specifically:

[0043] (1) Stretching the doped mandrel and the first quartz-clad sleeve RIT until the cross-sectional area ratio matches the second quartz-clad cross-sectional area ratio, and processing the cross-section into a predetermined shape to obtain a semi-finished preform;

[0044] (2)...

Embodiment 1

[0048] 20 / 350 / 400 type ytterbium-doped triple-clad optical fiber preform and its preparation method

[0049] A rare earth-doped optical fiber preform, including a doped core layer, a first silica cladding, and a second silica cladding from inside to outside;

[0050] The numerical aperture of the doped core layer relative to the first quartz cladding layer is 0.06, and the radius of the doped core layer is 3.00 mm. The core doping composition is 1.0%wt Yb 2 o 3 , 3.5% wt P 2 o 5 , 3.0% wt Al 2 o 3 , 92.5% wt SiO 2 .

[0051] The first quartz cladding is a pure quartz cladding; the cross-sectional shape is a regular octagon. The diameter ratio of the first quartz cladding layer and doped core layer (such as Figure 4 a 2 :a 1 ) is 17.5:1 (the cross-sectional area ratio of the first quartz cladding layer and the doped core layer is 322:1).

[0052] The numerical aperture of described second quartz cladding relative to the first quartz cladding is 0.22, and its diamet...

Embodiment 2

[0062] A kind of ytterbium-doped triple-clad optical fiber preform and its preparation method

[0063] A rare earth-doped optical fiber preform, including a doped core layer, a first silica cladding, and a second silica cladding from inside to outside;

[0064] The numerical aperture of the doped core layer relative to the first quartz cladding layer is 0.2, and the radius of the doped core layer is 6.00 mm. The core doping composition is 1.0%wt Yb 2 o 3 , 3.5% wt P 2 o 5 , 6.2% wt Al 2 o 3 .

[0065] The first quartz cladding is a pure quartz cladding; the cross-sectional shape is a regular hexagon with a radius of 7.8 mm, and the radius of the first quartz cladding refers to half the distance between two parallel opposite sides of the hexagon.

[0066] The numerical aperture of the second quartz cladding relative to the first quartz cladding is 0.12; the second quartz cladding is a fluorine-doped quartz layer, and the mass percentage of fluorine doping is 1.18%. The ...

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

PropertyMeasurementUnit
radiusaaaaaaaaaa
diameteraaaaaaaaaa
radiusaaaaaaaaaa
Login to View More

Abstract

The invention discloses a doped optical fiber preformed rod and a preparation method thereof. The preformed rod comprises a doped core layer, a first quartz cladding layer and a second quartz cladding layer from inside to out; the numerical aperture of the second quartz cladding layer relative to the first quartz cladding layer ranges from 0.1 to 0.24; the section of the second quartz cladding layer is round. The doped optical fiber preformed rod is prepared according to the following method: (1) wrapping the doped core layer with the first quartz cladding layer material, stretching until the section area ratio is matched with the section area ratio of the second quartz cladding layer, and processing the section into predetermined appearance to obtain a preformed rod semi-finished product; (2) wrapping the preformed rod semi-finished product with the second quartz cladding layer material and processing the section into round to obtain the doped optical fiber preformed rod. The optical fiber preformed rod provided by the invention facilitates wire-drawing forming and pump light leakage is greatly reduced; according to the preparation method, the geometric concentricity of the preformed rod can be guaranteed and the consistency of the optical fiber production batches is improved.

Description

technical field [0001] The invention belongs to the field of optical fiber laser technology, and more specifically relates to a rare earth-doped optical fiber prefabricated rod for lasers and a preparation method thereof. Background technique [0002] Fiber laser is a kind of laser that uses optical fiber as laser gain medium. By doping different rare earth ions in the fiber quartz matrix, laser output in different bands can be obtained. Due to the advantages of high beam quality, large specific surface area, good heat dissipation, high conversion efficiency, small size, compact structure, and easy maintenance, fiber lasers are widely used in many fields such as industrial processing, medical treatment, military affairs, and communications. [0003] The single-clad rare-earth-doped fiber was used in the early stage, and the pump light was required to be injected directly into the fiber core. When the pump power gradually increased, it was difficult to further improve the pum...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/012
CPCC03B37/01211C03B2201/07C03B2201/12C03B2201/28C03B2201/32C03B2201/34C03B2203/12
Inventor 黄宏琪孙程杨玉诚岳天勇徐峰周游李郴曹蓓蓓
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com